Pub Date : 2022-09-15DOI: 10.4257/oeco.2022.2603.04
Sávio A. S. N. Moraes, V. Vale, C. E. Alencar, F. Freire
Gastropods are known for the presence of calcareous shells, even after their death. The diversity of this resource can be reflected in the local diversity of living gastropods. These shells are used by hermit crabs as protection and against desiccation. Coastal lagoons are biodiversity hotspots and the site of recruitment of continent-sea connectivity, and their diversity is sometimes altered by connectivity events with adjacent areas. Therefore, we sought to make a list that evaluates the seasonal variation of diversity and demonstrates the pattern of shell use by hermit crab species. The samplings were standardized in six monthly repeated transects from February 2013 to January 2014, using a fishing net trawl. The shells were identified to species level and quantified. Diversity indexes were calculated, seasonally, for the assemblage of used shells. Hermit crabs used 14 species of gastropod shells, of which Vitta virginea and Phrontis vibex were the most abundant and frequent. The diversity indexes indicated a temporal variation of the shells, with April the month showing the highest difference in diversity. A reflection of the change in surface geomorphology, caused by the King Tide, it’s discharge and carrying of empty gastropod shells to the open sea. The usage patterns of these biogenic remains can reveal strategies of decreased intra/interspecific competition. Furthermore, we described the first record in the Brazilian Northeast of the hermit crab C. symmetricus, after its taxonomic resurgence.
{"title":"PAGURIZED GASTROPOD SHELLS IN A NORTHEAST BRAZILIAN COASTAL LAGOON AT THE SEA-ESTUARY INTERFACE","authors":"Sávio A. S. N. Moraes, V. Vale, C. E. Alencar, F. Freire","doi":"10.4257/oeco.2022.2603.04","DOIUrl":"https://doi.org/10.4257/oeco.2022.2603.04","url":null,"abstract":"Gastropods are known for the presence of calcareous shells, even after their death. The diversity of this resource can be reflected in the local diversity of living gastropods. These shells are used by hermit crabs as protection and against desiccation. Coastal lagoons are biodiversity hotspots and the site of recruitment of continent-sea connectivity, and their diversity is sometimes altered by connectivity events with adjacent areas. Therefore, we sought to make a list that evaluates the seasonal variation of diversity and demonstrates the pattern of shell use by hermit crab species. The samplings were standardized in six monthly repeated transects from February 2013 to January 2014, using a fishing net trawl. The shells were identified to species level and quantified. Diversity indexes were calculated, seasonally, for the assemblage of used shells. Hermit crabs used 14 species of gastropod shells, of which Vitta virginea and Phrontis vibex were the most abundant and frequent. The diversity indexes indicated a temporal variation of the shells, with April the month showing the highest difference in diversity. A reflection of the change in surface geomorphology, caused by the King Tide, it’s discharge and carrying of empty gastropod shells to the open sea. The usage patterns of these biogenic remains can reveal strategies of decreased intra/interspecific competition. Furthermore, we described the first record in the Brazilian Northeast of the hermit crab C. symmetricus, after its taxonomic resurgence.","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45278218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.16
Murilo Minello, André Fonseca, Cláudio Marinho, F. A. Esteves
Este trabalho teve como objetivo avaliar os efeitos das alterações dos valores de salinidade e da disponibilidade de substratos sobre a metanogênese em duas lagoas costeiras do Norte Fluminense (lagoa Cabiúnas, de água doce à salobra, e lagoa Piripiri, de salobra à hipersalina). Para tanto, realizou-se: (1) levantamento bibliométrico na base Scopus (Elsevier) sobre o tema ‘methanogenesis’ e ‘salinity’; (2) experimentos onde alteramos as concentrações de salinidade e as concentrações de sulfato e acetato. O levantamento bibliométrico demonstrou o aumento das publicações sobre o tema ao longo do tempo, indicando uma nova tendência desse campo de pesquisa no cenário científico. Quanto à adição de NaCl, houve crescimento na produção de metano na lagoa Cabiúnas no aumento de salinidade de 0,9 para 4,0. Na lagoa Piripiri o incremento na produção de metano foi observado com aumento da salinidade de 69,1 para 155,0. Os aumentos maiores da salinidade inibiram a produção de metano na lagoa Cabiúnas e não alteraram na lagoa Piripiri. A adição de sulfato reduziu significativamente a produção de metano na lagoa Cabiúnas, enquanto a adição de acetato a fez aumentar. A adição de sulfato e acetato não alterou a produção de metano na lagoa Piripiri. Estes resultados demonstram o efeito da alteração nos valores de salinidade sobre a produção de metano em ambas as lagoas e que há competição entre a biota metanogênica e a sulfato-redutora na lagoa Cabiúnas enquanto o mesmo não ocorre na lagoa Piripiri. SALINITY AND SUBSTRATE AVAILABILITY: IMPLICATIONS FOR METHANOGENIC ACTIVITY IN TWO COASTAL LAGOONS IN THE NORTH OF THE STATE OF RIO DE JANEIRO, BRAZIL: This study aimed to evaluate the effects of changes in salinity values and availability of substrates on methanogenesis in two coastal lagoons in Northern Fluminense (Cabiúnas lagoon, from fresh to brackish water, and Piripiri lagoon, from brackish to hypersaline). To this end, it was carried out: (1) a bibliometric survey on the Scopus (Elsevier) base on the theme ‘methanogenesis’ and ‘salinity’; (2) experiments where we changed the salinity concentrations and the sulfate and acetate concentrations. The bibliometric survey showed an increase in publications on the subject over time, indicating a new trend in this field of research in the scientific scenario. As for the addition of NaCl, there was an increase in the production of methane in the Cabiúnas lagoon, with an increase in salinity from 0.9 to 4.0. In the Piripiri lagoon the increment in methane production was observed with an increase in salinity from 69.1 to 155.0. Higher increases in salinity inhibited methane production in the Cabiúnas lagoon and did not change in the Piripiri lagoon. The addition of sulfate reduced while the addition of acetate significantly increased the production of methane in the Cabiúnas lagoon. The addition of sulfate and acetate did not alter the methane production in the Piripiri lagoon. These results demonstrate the effect of the
本研究旨在评估盐度值和基质有效性的变化对北弗卢米嫩塞两个沿海泻湖(cabiunas泻湖，从淡水到微咸水，和Piripiri泻湖，从微咸到高盐)产甲烷的影响。为此，我们进行了:(1)在Scopus (Elsevier)数据库中对“甲烷生成”和“盐度”进行了文献计量学调查;(2)改变盐度浓度、硫酸盐和醋酸盐浓度的实验。文献计量学调查显示，随着时间的推移，关于这一主题的出版物有所增加，表明这一研究领域在科学领域出现了新的趋势。在NaCl添加量方面，当盐度从0.9增加到4.0时，cabiunas泻湖的甲烷产量增加。在Piripiri泻湖，甲烷产量增加，盐度从69.1增加到155.0。盐度的增加抑制了cabiunas泻湖甲烷的产生，而Piripiri泻湖则没有变化。硫酸盐的加入显著降低了cabiunas泻湖的甲烷产量，而醋酸盐的加入则增加了甲烷产量。硫酸盐和醋酸盐的加入对吡啶池甲烷的产生没有影响。这些结果表明，盐度值的变化对两个泻湖甲烷产量的影响，cabiunas泻湖产甲烷生物群与硫酸盐还原生物群之间存在竞争，而Piripiri泻湖则没有。SALINITY AND SUBSTRATE可用性:METHANOGENIC活动两个沿海泻湖的影响超过巴西里约热内卢的状态:这个研究aimed evaluate THE SALINITY值变化的影响和可用性的substrates methanogenesis在两个沿海泻湖巴西北部(Cabiúnas泻湖,从新鲜到brackish泻湖水,和辣椒,从brackish hypersaline)。为此目的，提出了:(1)基于Scopus (Elsevier)的“甲烷生成”和“盐度”主题的文献计量调查;(2)改变盐度浓度和硫酸盐和醋酸盐浓度的实验。文献计量调查显示，随着时间的推移，关于这一主题的出版物有所增加，表明在科学情景中这一研究领域出现了新的趋势。= =地理= =根据美国人口普查局的数据，该镇总面积为，其中土地和(1.0%)水。= =地理= =根据美国人口普查局的数据，该县总面积为，其中土地和(1.2%)水。= =地理= =根据美国人口普查，cdp的总面积为，其中土地和(1.2%)水。= =地理= =根据美国人口普查，这个县的总面积为，其中土地和(1.2%)水。= =地理= =根据美国人口普查局的数据，该镇总面积为，其中土地和(1.2%)水。这些结果表明，盐度值的变化对两个泻湖的甲烷生产产生了影响，cabiunas泻湖中产甲烷和硫酸盐还原生物群之间存在竞争，而Piripiri泻湖中不存在同样的生物群。
{"title":"SALINIDADE E DISPONIBILIDADE DE SUBSTRATOS: IMPLICAÇÕES SOBRE A ATIVIDADE METANOGÊNICA EM DUAS LAGOAS COSTEIRAS DO NORTE FLUMINENSE","authors":"Murilo Minello, André Fonseca, Cláudio Marinho, F. A. Esteves","doi":"10.4257/oeco.2022.2602.16","DOIUrl":"https://doi.org/10.4257/oeco.2022.2602.16","url":null,"abstract":"Este trabalho teve como objetivo avaliar os efeitos das alterações dos valores de salinidade e da disponibilidade de substratos sobre a metanogênese em duas lagoas costeiras do Norte Fluminense (lagoa Cabiúnas, de água doce à salobra, e lagoa Piripiri, de salobra à hipersalina). Para tanto, realizou-se: (1) levantamento bibliométrico na base Scopus (Elsevier) sobre o tema ‘methanogenesis’ e ‘salinity’; (2) experimentos onde alteramos as concentrações de salinidade e as concentrações de sulfato e acetato. O levantamento bibliométrico demonstrou o aumento das publicações sobre o tema ao longo do tempo, indicando uma nova tendência desse campo de pesquisa no cenário científico. Quanto à adição de NaCl, houve crescimento na produção de metano na lagoa Cabiúnas no aumento de salinidade de 0,9 para 4,0. Na lagoa Piripiri o incremento na produção de metano foi observado com aumento da salinidade de 69,1 para 155,0. Os aumentos maiores da salinidade inibiram a produção de metano na lagoa Cabiúnas e não alteraram na lagoa Piripiri. A adição de sulfato reduziu significativamente a produção de metano na lagoa Cabiúnas, enquanto a adição de acetato a fez aumentar. A adição de sulfato e acetato não alterou a produção de metano na lagoa Piripiri. Estes resultados demonstram o efeito da alteração nos valores de salinidade sobre a produção de metano em ambas as lagoas e que há competição entre a biota metanogênica e a sulfato-redutora na lagoa Cabiúnas enquanto o mesmo não ocorre na lagoa Piripiri. SALINITY AND SUBSTRATE AVAILABILITY: IMPLICATIONS FOR METHANOGENIC ACTIVITY IN TWO COASTAL LAGOONS IN THE NORTH OF THE STATE OF RIO DE JANEIRO, BRAZIL: This study aimed to evaluate the effects of changes in salinity values and availability of substrates on methanogenesis in two coastal lagoons in Northern Fluminense (Cabiúnas lagoon, from fresh to brackish water, and Piripiri lagoon, from brackish to hypersaline). To this end, it was carried out: (1) a bibliometric survey on the Scopus (Elsevier) base on the theme ‘methanogenesis’ and ‘salinity’; (2) experiments where we changed the salinity concentrations and the sulfate and acetate concentrations. The bibliometric survey showed an increase in publications on the subject over time, indicating a new trend in this field of research in the scientific scenario. As for the addition of NaCl, there was an increase in the production of methane in the Cabiúnas lagoon, with an increase in salinity from 0.9 to 4.0. In the Piripiri lagoon the increment in methane production was observed with an increase in salinity from 69.1 to 155.0. Higher increases in salinity inhibited methane production in the Cabiúnas lagoon and did not change in the Piripiri lagoon. The addition of sulfate reduced while the addition of acetate significantly increased the production of methane in the Cabiúnas lagoon. The addition of sulfate and acetate did not alter the methane production in the Piripiri lagoon. These results demonstrate the effect of the ","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42966156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.18
A. Enrich-Prast, V. Figueiredo, F. Machado‐Silva, R. B. Peixoto, Leonardo Amora-Nogueira, Gabriela Cugler, Maria Carolina Barroso dos Santos, J. P. Felizardo, J. Valle, Davi Pedroni Barreto, Luciene Valladares, Laís Rodrigues, A. Santoro, L. Pinho, C. N. Signori, R. Pollery, E. Silva, H. Marotta
Methane (CH4) oxidation is a critical process to reduce CH4 emissions from aquatic environments to the atmosphere. Considering the continuous increase in nitrogen in rivers, lakes, and lagoons from human sources, we re-evaluated the still controversial potential effect of inorganic nitrogen on CH4 oxidation. Here, we approached three shallow coastal lagoons that represent great environmental heterogeneity and used slurry sediments as a model system. The addition of ammonium chloride (NH4Cl) and potassium nitrate (KNO3) significantly stimulated CH4 oxidation in the sediments of all studied lagoons, indicating the potential limitation of nitrogen for the growth of CH4 oxidizing bacteria. Our findings contrast to some previous reports, where ammonium and nitrate inhibited CH4 oxidation in sediments. Indeed, our experiment was performed in a more realistic range in relation to natural concentrations of inorganic nitrogen in aquatic systems (0.5 to 1 mM) and was opposed to extreme concentrations previously used (2 to 50 mM). Our results point to the need to further assess the connection between nitrogen inputs and CH4 budgets in aquatic sediments, considering the potential fuel for CH4 oxidation that may affect the global greenhouse gas balance
{"title":"INORGANIC NITROGEN STIMULATES METHANE OXIDATION IN COASTAL LAGOON SEDIMENTS","authors":"A. Enrich-Prast, V. Figueiredo, F. Machado‐Silva, R. B. Peixoto, Leonardo Amora-Nogueira, Gabriela Cugler, Maria Carolina Barroso dos Santos, J. P. Felizardo, J. Valle, Davi Pedroni Barreto, Luciene Valladares, Laís Rodrigues, A. Santoro, L. Pinho, C. N. Signori, R. Pollery, E. Silva, H. Marotta","doi":"10.4257/oeco.2022.2602.18","DOIUrl":"https://doi.org/10.4257/oeco.2022.2602.18","url":null,"abstract":"Methane (CH4) oxidation is a critical process to reduce CH4 emissions from aquatic environments to the atmosphere. Considering the continuous increase in nitrogen in rivers, lakes, and lagoons from human sources, we re-evaluated the still controversial potential effect of inorganic nitrogen on CH4 oxidation. Here, we approached three shallow coastal lagoons that represent great environmental heterogeneity and used slurry sediments as a model system. The addition of ammonium chloride (NH4Cl) and potassium nitrate (KNO3) significantly stimulated CH4 oxidation in the sediments of all studied lagoons, indicating the potential limitation of nitrogen for the growth of CH4 oxidizing bacteria. Our findings contrast to some previous reports, where ammonium and nitrate inhibited CH4 oxidation in sediments. Indeed, our experiment was performed in a more realistic range in relation to natural concentrations of inorganic nitrogen in aquatic systems (0.5 to 1 mM) and was opposed to extreme concentrations previously used (2 to 50 mM). Our results point to the need to further assess the connection between nitrogen inputs and CH4 budgets in aquatic sediments, considering the potential fuel for CH4 oxidation that may affect the global greenhouse gas balance","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44465239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.14
Walter Luis Muedas Yauri, R. Barbieri
O baixo curso do rio Pindaré faz parte de um complexo rio-planície de inundação que possui alto dinamismo, principalmente no nível de água e em seus parâmetros físicos e químicos, como resultado do período chuvoso e também altas marés no período seco. O presente estudo teve como objetivo avaliar a intrusão salina no baixo curso do rio Pindaré, até as proximidades da cidade de Cajari, por meio das variáveis físico-químicas. Foram realizadas seis campanhas de coleta, de dezembro de 2014 a fevereiro de 2016, em sete pontos de amostragem. Os parâmetros medidos foram material em suspensão (TSS), transparência (Secchi), e temperatura, condutividade elétrica, salinidade, pH, oxigênio dissolvido, potencial oxi-redox e percentual de oxigênio na água, com o multiparâmetro da marca YSI® modelo 556. Parâmetros como transparência da água (25 cm) e percentual de oxigênio dissolvido (85%) apresentaram valores maiores na zona mais distante da influência da maré e menores na zona com alta influência (12 cm e 65%, respectivamente), enquanto que salinidade, condutividade elétrica e pH tiveram valores maiores na zona com alta influência da maré (2 g kg-1, 5.100 µS cm-1 e 7,6, respectivamente). Os valores de TSS variaram de 10,2 mg L-1 a 400,1 mg L-1, 40 km e 25 km da foz do rio Pindaré respectivamente, durante a maré de sizígia (período seco), mostrando o efeito de turbulência quanto mais próximo da desembocadura. Foram observadas variações nos parâmetros, indicando que a intrusão salina no baixo curso do rio Pindaré influencia os parâmetros físico-químicos da água na estação seca, principalmente nas marés de sizígia. O aumento da vazão de água doce do rio e o alto nível de água na estação chuvosa induziram características de água doce no trecho estudado do rio. SALINE INTRUSION IN A TROPICAL RIVER – FLOODPLAIN SYSTEM INFLUENCED BY MACRO-TIDES – PINDARÉ RIVER (MA), BRAZIL: The lower course of the Pindaré River is part of a river-floodplain complex that has high dynamism, mainly in its water level, physical and chemical parameters, as a result of the rainy season and also high tides during dry season. The present study aimed to evaluate the saline intrusion in the lower course of the Pindaré River, up to the vicinity of the city of Cajari, through the water physical and chemical variables. Six campaigns were carried out at seven sampling stations from December 2014 to February 2016. The parameters measured were total suspended solids (TSS), transparency (Secchi), and temperature, electrical conductivity, salinity, pH, dissolved oxygen, oxy-redox potential and percentage of oxygen in water using the YSI® model 556 multiparameter. Water transparency (25 cm) and percentage of dissolved oxygen (85%) showed higher values in the área under less tidal influence and lower values in the area with high tidal influence (12 cm and 65%, respectively), while salinity, electrical conductivity and pH had higher values in the zone with high tidal influence (2 g kg-1; 5,100 µS cm-1 an
Pindaré河的下游是洪泛平原复合体的一部分，由于雨季和旱季的高潮，洪泛平原具有高度的动态性，主要是水位及其物理和化学参数。本研究旨在通过物理化学变量评估卡贾里市附近平达雷河下游的盐水入侵。从2014年12月到2016年2月，在七个采样点开展了六次收集活动。测量的参数包括悬浮物质（TSS）、透明度（Secchi）、温度、电导率、盐度、pH、溶解氧、氧氧化还原电位和水中的氧百分比® 型号556。水透明度（25厘米）和溶解氧百分比（85%）等参数在离潮汐影响最远的区域显示出较高的值，而在影响较大的区域则显示出较低的值（分别为12厘米和65%），而在潮汐影响较大的区域，电导率和pH值较高（分别为2 g kg-1、5100µS cm-1和7.6）。在锡齐吉亚潮（旱季）期间，TSS值在距离平达雷河口40公里和25公里的10.2 mg L-1至400.1 mg L-1之间，表明离河口越近就会产生湍流效应。观察到参数的变化，表明平达雷河下游的盐水入侵影响了旱季水的物理化学参数，尤其是在syzygia的潮汐中。河流淡水流量的增加和雨季的高水位引起了所研究河段的淡水特征。受宏观影响的热带河流-洪泛平原系统中的盐水入侵-巴西平达雷河（MA）：平达雷河流的下游是河流泛滥平原复合体的一部分，由于雨季和旱季的高潮，该复合体具有高度的动态性，主要是水位、物理和化学参数。本研究旨在通过水的物理和化学变量评估平达雷河下游直至卡贾里市附近的盐水入侵。2014年12月至2016年2月，在七个采样站开展了六次活动。使用YSI测量的参数包括总悬浮固体（TSS）、透明度（Secchi）、温度、电导率、盐度、pH、溶解氧、氧氧化还原电位和水中氧的百分比® 型号556多参数。在潮汐影响较小的区域，水透明度（25 cm）和溶解氧百分比（85%）较高，在潮汐影响较大的区域（分别为12 cm和65%）较低，而在潮汐影响较高的区域，盐度、电导率和pH值较高（分别为2 g kg-1；5100µS cm-1和7.6）。TSS值范围为10.2至400.1 mg L-1，分别距离平达雷河流出口40公里和25公里，也就是说，在旱季大潮期间，离河口越近，湍流效应越大。观察到参数的变化，表明平达雷河下游的盐水入侵影响旱季的水物理和化学参数，尤其是在大潮中。河流淡水流量的增加和雨季的高水位引起了研究河段的淡水特征。
{"title":"INTRUSÃO SALINA EM UM SISTEMA RIO – PLANÍCIE DE INUNDAÇÃO TROPICAL INFLUENCIADO POR MACROMARÉS – RIO PINDARÉ (MA)","authors":"Walter Luis Muedas Yauri, R. Barbieri","doi":"10.4257/oeco.2022.2602.14","DOIUrl":"https://doi.org/10.4257/oeco.2022.2602.14","url":null,"abstract":"O baixo curso do rio Pindaré faz parte de um complexo rio-planície de inundação que possui alto dinamismo, principalmente no nível de água e em seus parâmetros físicos e químicos, como resultado do período chuvoso e também altas marés no período seco. O presente estudo teve como objetivo avaliar a intrusão salina no baixo curso do rio Pindaré, até as proximidades da cidade de Cajari, por meio das variáveis físico-químicas. Foram realizadas seis campanhas de coleta, de dezembro de 2014 a fevereiro de 2016, em sete pontos de amostragem. Os parâmetros medidos foram material em suspensão (TSS), transparência (Secchi), e temperatura, condutividade elétrica, salinidade, pH, oxigênio dissolvido, potencial oxi-redox e percentual de oxigênio na água, com o multiparâmetro da marca YSI® modelo 556. Parâmetros como transparência da água (25 cm) e percentual de oxigênio dissolvido (85%) apresentaram valores maiores na zona mais distante da influência da maré e menores na zona com alta influência (12 cm e 65%, respectivamente), enquanto que salinidade, condutividade elétrica e pH tiveram valores maiores na zona com alta influência da maré (2 g kg-1, 5.100 µS cm-1 e 7,6, respectivamente). Os valores de TSS variaram de 10,2 mg L-1 a 400,1 mg L-1, 40 km e 25 km da foz do rio Pindaré respectivamente, durante a maré de sizígia (período seco), mostrando o efeito de turbulência quanto mais próximo da desembocadura. Foram observadas variações nos parâmetros, indicando que a intrusão salina no baixo curso do rio Pindaré influencia os parâmetros físico-químicos da água na estação seca, principalmente nas marés de sizígia. O aumento da vazão de água doce do rio e o alto nível de água na estação chuvosa induziram características de água doce no trecho estudado do rio. SALINE INTRUSION IN A TROPICAL RIVER – FLOODPLAIN SYSTEM INFLUENCED BY MACRO-TIDES – PINDARÉ RIVER (MA), BRAZIL: The lower course of the Pindaré River is part of a river-floodplain complex that has high dynamism, mainly in its water level, physical and chemical parameters, as a result of the rainy season and also high tides during dry season. The present study aimed to evaluate the saline intrusion in the lower course of the Pindaré River, up to the vicinity of the city of Cajari, through the water physical and chemical variables. Six campaigns were carried out at seven sampling stations from December 2014 to February 2016. The parameters measured were total suspended solids (TSS), transparency (Secchi), and temperature, electrical conductivity, salinity, pH, dissolved oxygen, oxy-redox potential and percentage of oxygen in water using the YSI® model 556 multiparameter. Water transparency (25 cm) and percentage of dissolved oxygen (85%) showed higher values in the área under less tidal influence and lower values in the area with high tidal influence (12 cm and 65%, respectively), while salinity, electrical conductivity and pH had higher values in the zone with high tidal influence (2 g kg-1; 5,100 µS cm-1 an","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43793846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.13
Davi Almeida Barreto, A. L. Furtado, S. Folharini, C. Marinho, A. Rocha, R. Bozelli, J. Azevedo, L. Silva
Rivers, as most bodies of water, are subject to eutrophication and water contamination, mainly from domestic sewage and industrial discharges from urban centers and agricultural areas. These growing human impacts result in a gradual loss of water quality and changes in biotic communities, including phytoplankton. Analyzing the dynamics of phytoplankton is important to understand how, in addition to hydrography and the physical, chemical and biological variables, human impact can be a controlling factor in this dynamic. In this study, we analyzed abiotic variables and zooplankton abundance to identify the factors controlling different phytoplankton attributes at six sampling points, in two climatic periods and three years, in the Piabanha River, a slowly flowing stream with to strong human impact beginning in its upper course, in a mountain region in southeastern Brazil. The results showed homogeneous environmental variables and different phytoplankton attributes along most of the stretch analyzed, except for sampling point 1, located in a preserved forest area but with nutrient concentrations limiting phytoplankton growth. The difference in flow between the two climatic periods (dry and wet) was not sufficient to change the total phytoplankton biovolume. Temperature seemed to strongly affect the phytoplankton response, with larger relative contributions from cyanobacteria in the wet period, with higher temperatures, and from phytoflagellates in the dry period, with lower temperatures. As expected, zooplankton showed no influence on phytoplankton dynamics, with a large contribution from small rotifers. In this tropical montane river, with slow flow and intense human impacts, nutrient concentrations and temperature were the main drivers of the spatial and temporal dynamics of phytoplankton, respectively
{"title":"SPATIAL AND TEMPORAL DYNAMICS OF PHYTOPLANKTON IN A HIGHLY IMPACTED TROPICAL MONTANE RIVER","authors":"Davi Almeida Barreto, A. L. Furtado, S. Folharini, C. Marinho, A. Rocha, R. Bozelli, J. Azevedo, L. Silva","doi":"10.4257/oeco.2022.2602.13","DOIUrl":"https://doi.org/10.4257/oeco.2022.2602.13","url":null,"abstract":"Rivers, as most bodies of water, are subject to eutrophication and water contamination, mainly from domestic sewage and industrial discharges from urban centers and agricultural areas. These growing human impacts result in a gradual loss of water quality and changes in biotic communities, including phytoplankton. Analyzing the dynamics of phytoplankton is important to understand how, in addition to hydrography and the physical, chemical and biological variables, human impact can be a controlling factor in this dynamic. In this study, we analyzed abiotic variables and zooplankton abundance to identify the factors controlling different phytoplankton attributes at six sampling points, in two climatic periods and three years, in the Piabanha River, a slowly flowing stream with to strong human impact beginning in its upper course, in a mountain region in southeastern Brazil. The results showed homogeneous environmental variables and different phytoplankton attributes along most of the stretch analyzed, except for sampling point 1, located in a preserved forest area but with nutrient concentrations limiting phytoplankton growth. The difference in flow between the two climatic periods (dry and wet) was not sufficient to change the total phytoplankton biovolume. Temperature seemed to strongly affect the phytoplankton response, with larger relative contributions from cyanobacteria in the wet period, with higher temperatures, and from phytoflagellates in the dry period, with lower temperatures. As expected, zooplankton showed no influence on phytoplankton dynamics, with a large contribution from small rotifers. In this tropical montane river, with slow flow and intense human impacts, nutrient concentrations and temperature were the main drivers of the spatial and temporal dynamics of phytoplankton, respectively","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47012513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.15
Laís Samira Correia Nunes, A. F. Camargo
The arrival order in species colonization may be important to the communities’ organization of perennial plants along environmental gradients. In estuarine gradients, the competitive exclusion may have great importance to species zonation regardless of their arrival order. However, priority effect has also been considered, since founder species may remain in the environment even with the later arrival of species of greater competitive ability. We evaluated whether the arrival order and priority effect influence the interspecific interaction between adult individuals (early-colonizing individuals) and young individuals (later-arriving individuals) of the perennial emergent estuarine aquatic macrophytes Spartina alterniflora (S) and Crinum americanum (C). We conducted a laboratory experiment with four cultures (monocultures of early-colonizing individuals of S; monocultures of early-colonizing individuals of C; cultures of early-colonizing individuals of S with introduction of later-arriving individuals of C; and cultures of early-colonizing individuals of C with introduction of later-arriving individuals of S) and two sediment types (lower and middle estuary sediment: salinity 32 and 20, respectively). We hypothesized that, due to the priority effect, in both sediment types (i) the later-arriving species would not establish itself in adult early-colonizing vegetation and (ii) the later-arriving species would not limit the growth of the early-colonizing species. Our results corroborate our hypotheses as the later-arriving individuals of S. alterniflora and C. americanum did not grow up and establish themselves in the heterospecific cultures of early-colonizing individuals in both sediment types. Furthermore, the growth of the early-colonizing individuals was not limited by the presence of the later-arriving individuals. We conclude that the arrival order and priority effect can influence the interspecific competition, communities’ organization and spatial distribution of aquatic macrophytes in tropical estuaries.
{"title":"ARRIVAL ORDER AND AQUATIC MACROPHYTE COMMUNITY ORGANIZATION IN A TROPICAL ESTUARY","authors":"Laís Samira Correia Nunes, A. F. Camargo","doi":"10.4257/oeco.2022.2602.15","DOIUrl":"https://doi.org/10.4257/oeco.2022.2602.15","url":null,"abstract":"The arrival order in species colonization may be important to the communities’ organization of perennial plants along environmental gradients. In estuarine gradients, the competitive exclusion may have great importance to species zonation regardless of their arrival order. However, priority effect has also been considered, since founder species may remain in the environment even with the later arrival of species of greater competitive ability. We evaluated whether the arrival order and priority effect influence the interspecific interaction between adult individuals (early-colonizing individuals) and young individuals (later-arriving individuals) of the perennial emergent estuarine aquatic macrophytes Spartina alterniflora (S) and Crinum americanum (C). We conducted a laboratory experiment with four cultures (monocultures of early-colonizing individuals of S; monocultures of early-colonizing individuals of C; cultures of early-colonizing individuals of S with introduction of later-arriving individuals of C; and cultures of early-colonizing individuals of C with introduction of later-arriving individuals of S) and two sediment types (lower and middle estuary sediment: salinity 32 and 20, respectively). We hypothesized that, due to the priority effect, in both sediment types (i) the later-arriving species would not establish itself in adult early-colonizing vegetation and (ii) the later-arriving species would not limit the growth of the early-colonizing species. Our results corroborate our hypotheses as the later-arriving individuals of S. alterniflora and C. americanum did not grow up and establish themselves in the heterospecific cultures of early-colonizing individuals in both sediment types. Furthermore, the growth of the early-colonizing individuals was not limited by the presence of the later-arriving individuals. We conclude that the arrival order and priority effect can influence the interspecific competition, communities’ organization and spatial distribution of aquatic macrophytes in tropical estuaries.","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43301968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.20
M. Bevilacqua, R. Felix, Marcos Paulo Figueiredo Barros, F. Esteves
This study aimed to characterize and evaluate factors driving the structure of the benthic macroinvertebrate community in coastal lagoons at the Restinga de Jurubatiba National Park. Sixteen lagoons were sampled in July 2010 during the dry season. At each lagoon, three samples were taken in the central region and three samples were taken near the sandbar. At each point, the limnological variables and the benthic community were collected. Richness and abundance were calculated for each sample. The correlations among the environmental parameters were tested using Pearson's correlation. A Principal Component Analysis using environmental variables was performed to visualize the similarity among samples. Simple regressions were used to assess the correlation between macroinvertebrates' metrics and environmental parameters. A redundancy test was performed to link environmental parameters to the community structure of macroinvertebrates. A total of 1,719 macroinvertebrates were identified in 25 taxa groups that were classified as exclusive marine taxa, five as brackish/marine taxa, seven as freshwater taxa, and two taxa as groups with marine and freshwater representatives. The most abundant taxa were Leonereis sp., Heleobia australis, and Kalliapseudidae. Richness and abundance were negatively related to salinity. The redundancy test indicated pH, salinity, coarse grain size, and dissolved oxygen as the environmental variables explaining the macroinvertebrate community structure variation among the lagoons. Understanding the drives and dynamics which guide the macroinvertebrates communities' turnover in coastal lagoons is a relevant tool to subsidize environmental management decisions due to the increasing threats around the park.
本研究旨在描述和评估Restinga de Jurubatba国家公园沿海泻湖中底栖大型无脊椎动物群落结构的驱动因素。2010年7月，在旱季对16个泻湖进行了采样。在每个泻湖，在中部地区采集了三个样本，在沙洲附近采集了三份样本。在每一点上，都收集了湖沼学变量和底栖生物群落。计算每个样品的丰度和丰度。环境参数之间的相关性使用Pearson相关性进行检验。使用环境变量进行主成分分析，以可视化样本之间的相似性。使用简单回归来评估大型无脊椎动物的指标与环境参数之间的相关性。进行了一项冗余测试，将环境参数与大型无脊椎动物的群落结构联系起来。共有1719种大型无脊椎动物被鉴定为25个类群，这些类群被归类为专属海洋类群，5个为半咸水/海洋类群，7个为淡水类群，2个类群为具有海洋和淡水代表性的类群。最丰富的分类群是Leonereis sp.、澳大利亚Heleobia australis和Kalliapseudidae。丰度和丰度与盐度呈负相关。冗余度测试表明，pH、盐度、粗粒径和溶解氧是解释泻湖间大型无脊椎动物群落结构变化的环境变量。由于公园周围的威胁越来越大，了解指导大型无脊椎动物群落在沿海泻湖中流动的驱动力和动态是补贴环境管理决策的相关工具。
{"title":"DETERMINANT DRIVERS FOR THE COMMUNITY STRUCTURE OF BENTHIC MACROINVERTEBRATES IN COASTAL LAGOONS AT THE RESTINGA DE JURUBATIBA NATIONAL PARK, IN THE STATE OF RIO DE JANEIRO STATE (BRAZIL)","authors":"M. Bevilacqua, R. Felix, Marcos Paulo Figueiredo Barros, F. Esteves","doi":"10.4257/oeco.2022.2602.20","DOIUrl":"https://doi.org/10.4257/oeco.2022.2602.20","url":null,"abstract":"This study aimed to characterize and evaluate factors driving the structure of the benthic macroinvertebrate community in coastal lagoons at the Restinga de Jurubatiba National Park. Sixteen lagoons were sampled in July 2010 during the dry season. At each lagoon, three samples were taken in the central region and three samples were taken near the sandbar. At each point, the limnological variables and the benthic community were collected. Richness and abundance were calculated for each sample. The correlations among the environmental parameters were tested using Pearson's correlation. A Principal Component Analysis using environmental variables was performed to visualize the similarity among samples. Simple regressions were used to assess the correlation between macroinvertebrates' metrics and environmental parameters. A redundancy test was performed to link environmental parameters to the community structure of macroinvertebrates. A total of 1,719 macroinvertebrates were identified in 25 taxa groups that were classified as exclusive marine taxa, five as brackish/marine taxa, seven as freshwater taxa, and two taxa as groups with marine and freshwater representatives. The most abundant taxa were Leonereis sp., Heleobia australis, and Kalliapseudidae. Richness and abundance were negatively related to salinity. The redundancy test indicated pH, salinity, coarse grain size, and dissolved oxygen as the environmental variables explaining the macroinvertebrate community structure variation among the lagoons. Understanding the drives and dynamics which guide the macroinvertebrates communities' turnover in coastal lagoons is a relevant tool to subsidize environmental management decisions due to the increasing threats around the park.","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42337240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.04
S. Thomaz, P. Carvalho, R. Mormul, A. Padial, Elena F. Galvanese, L. M. Bini
In this review, we evaluate the contribution of Brazilian limnologists to research outputs on aquatic macrophyte ecology. We found a strong “adviser effect” of Professor F.A. Esteves on the Brazilian scientific production focused on aquatic macrophytes. In general, articles focused on a variety of themes, including, inter alia, the role of aquatic macrophytes on the biodiversity of other groups, the interaction between macrophytes and the environment, the effects of environmental factors on aquatic macrophytes distribution and biodiversity, the effects of invasive species on aquatic biodiversity, aquatic macrophytes control and decomposition. Emerging topics (e.g., metacommunity ecology, biodiversity-ecosystem functioning, and patterns of diversity and their determinants) are being embraced by Brazilian limnologists that use aquatic macrophytes as organism models. Despite the fact there is much to study, we think that directly (e.g., via mentoring) or indirectly (via publications), our current knowledge about macrophytes ecology was inspired by Chico Esteves.
{"title":"ECOLOGY OF AQUATIC MACROPHYTES IN BRAZIL: THE LEGACY OF FRANCISCO DE ASSIS ESTEVES","authors":"S. Thomaz, P. Carvalho, R. Mormul, A. Padial, Elena F. Galvanese, L. M. Bini","doi":"10.4257/oeco.2022.2602.04","DOIUrl":"https://doi.org/10.4257/oeco.2022.2602.04","url":null,"abstract":"In this review, we evaluate the contribution of Brazilian limnologists to research outputs on aquatic macrophyte ecology. We found a strong “adviser effect” of Professor F.A. Esteves on the Brazilian scientific production focused on aquatic macrophytes. In general, articles focused on a variety of themes, including, inter alia, the role of aquatic macrophytes on the biodiversity of other groups, the interaction between macrophytes and the environment, the effects of environmental factors on aquatic macrophytes distribution and biodiversity, the effects of invasive species on aquatic biodiversity, aquatic macrophytes control and decomposition. Emerging topics (e.g., metacommunity ecology, biodiversity-ecosystem functioning, and patterns of diversity and their determinants) are being embraced by Brazilian limnologists that use aquatic macrophytes as organism models. Despite the fact there is much to study, we think that directly (e.g., via mentoring) or indirectly (via publications), our current knowledge about macrophytes ecology was inspired by Chico Esteves.","PeriodicalId":39092,"journal":{"name":"Oecologia Australis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45910128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.06
C. J. Silva, Michele de Morais, Cristina Marcia de Menezes Buttaka, S. M. L. Oliveira, W. Lázaro, Carolina dos Santos, Breno Dias Vitorino, E. S. O. Junior, Josué Ribeiro da Silva Nunes
The aim of this work was to evaluate the gaps, trends and advances in the uses of the concepts of flood pulse and climate change through the analysis of scientometrics in Limnology in the Pantanal, between the years 1990 to 2021. The most studied ecological groups and rivers were: aquatic macrophytes and phytoplankton, and Cuiabá and Paraguai, respectively, with the highest number of article publications between 2016-2020. The temporal dynamics of social networks showed the presence of new local institutions, from other Brazilian and international states in the last 20 years. Studies on climate change are still incipient, while those related to the flood pulse are more frequent in the Pantanal. Trends and advances were found in the ecosystem approach of the flood pulse, related to the height of the water level. Few studies address the flood pulse in terms of duration and frequency. The flood pulse is shown as a consolidated concept, emerging as a highly sensitive tool in the face of short, medium and long-term environmental changes, such as climate change, making it possible to identify and deal with socio-environmental challenges and point out participatory governance mechanisms.
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Pub Date : 2022-07-08DOI: 10.4257/oeco.2022.2602.05
M. Callisto, J. J. Leal, Marcelo S. Moretti, Raphael Ligeiro
Os estudos relacionados à Ecologia de Organismos Bentônicos dedicam-se aos organismos que habitam o sedimento e substratos de fundo, consolidados ou não, de ecossistemas aquáticos continentais, tais como rios, riachos de cabeceira, lagos e reservatórios. Este artigo apresenta uma síntese sobre a importante contribuição do Prof. Francisco de Assis Esteves, do Laboratório de Limnologia da UFRJ, à formação de pessoal e à produção científica na área de Ecologia de Organismos Bentônicos no Brasil. Avaliamos os curricula vitae dos ex-alunos do Prof. Esteves, e seus orientados. Foram analisadas as bases Lattes/CNPq e Scopus, realizando avaliações qualitativas e quantitativas, respectivamente. Avaliamos a formação de pessoal desde a criação do Laboratório de Limnologia na UFRJ no final dos anos 80 e a produção científica (livros, capítulos de livros, artigos científicos publicados em revistas nacionais e internacionais), áreas de atuação, periódicos e programas de pós-graduação associados a ex-alunos do Prof. Esteves em que atualmente são realizados estudos sobre Ecologia de Organismos Bentônicos no Brasil. A contribuição científica desses estudos foi classificada em três grandes áreas: (i) Distribuição Espaço-temporal de Populações e Assembleias, e Estrutura de Comunidades Bentônicas; (ii) sua participação em Processos Ecológicos (p.ex.: Ciclagem de Nutrientes, Bioturbação e Decomposição de Matéria Orgânica, Interações Tróficas e Estequiometria Ecológica); e (iii) sua utilização como Bioindicadores de Qualidade de Água e em Índices Multimétricos de Integridade Ecológica. Identificamos as principais linhas de pesquisa desenvolvidas no período 1996-2021 e projetamos as perspectivas de novas abordagens para os próximos 20 anos, considerando o cenário político-ambiental no Brasil e na perspectiva de mudanças ambientais globais. A semente plantada no Laboratório de Limnologia da UFRJ pelo Prof. Esteves cresceu, frutificou e tem dispersado novas sementes para diferentes regiões do Brasil.
底栖生物生态学的研究主要集中在河流、源头溪流、湖泊和水库等大陆水生生态系统的沉积物和底物上，无论是否固结。本文综合了UFRJ湖沼学实验室Francisco de Assis Esteves教授对巴西底栖生物生态学领域人员培训和科学生产的重要贡献。我们评估了Esteves教授以前的学生和他们的导师的简历。对拿铁/CNPq和Scopus进行了分析，分别进行了定性和定量评价。竹材的湖沼学实验室的员工培训建立以来在80年代领导的科学生产(书籍、书籍、文章发表在科学杂志的章),性能方面,国内外期刊和相关研究生课程教授的校友驰骋在目前它是巴西的底栖生物生态问题研究。这些研究的科学贡献分为三个主要领域:(1)种群和组合的时空分布和底栖生物群落结构;(2)底栖生物群落结构;(3)底栖生物群落结构(ii)他们参与生态过程(例如营养循环、有机物的生物扰动和分解、营养相互作用和生态化学计量学);(iii)将其作为水质的生物指标和生态完整性的多指标。我们确定了1996-2021年期间发展的主要研究方向，并考虑到巴西的政治环境情景和全球环境变化的前景，设计了未来20年的新方法的前景。Esteves教授在UFRJ湖沼学实验室种植的种子生长、结果并将新的种子传播到巴西的不同地区。
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