Aquatic Botany最新文献

英文中文

Effect of light regime on seedling development of eelgrass (Zostera marina L.)

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-04-07 DOI: 10.1016/j.aquabot.2025.103898

Sahoko Takeda, Sayaka Watanabe, Naoya Miura, Hajime Shiota

Light plays a crucial role in plant development and growth. Plants use photoreceptors to perceive light of varying wavelengths and intensities, translating these signals into photoresponses. In the marine environments where seagrasses grow, blue light is predominant due to the absorption of longer wavelengths by water. To elucidate the photoresponses of seagrasses, we analyzed the photoresponses of young seedlings of eelgrass (Zostera marina), whose genome analysis has confirmed the presence of photoreceptors. When cultured under white, blue, green, or red light, the coleoptiles were shorter, and de-etiolated primary leaves were observed. Conversely, under dark conditions, coleoptiles were elongated, and primary leaves did not emerge. These findings indicate that light reduces coleoptile elongation and promotes the emergence and de-etiolation of primary leaves. The reduction in coleoptile elongation was enhanced under intense blue light but diminished under strong red light. Additionally, primary leaf emergence was lowered under high red light conditions. The expression of photoreceptor genes (ZoPHYA, ZoPHYB, and ZoCRY1) was upregulated during seed germination, with ZoPHYA and ZoCRY1 expression being particularly elevated at the coleoptile tips. Our results imply that, in young eelgrass seedlings, red and blue light are perceived at the coleoptile tips, triggering the transition from embryonic to vegetative growth. However, this transition is attenuated by intense red light. This response is likely to be an adaptive mechanism, enabling eelgrass to grow at optimal depths where blue light dominates.

{"title":"Effect of light regime on seedling development of eelgrass (Zostera marina L.)","authors":"Sahoko Takeda, Sayaka Watanabe, Naoya Miura, Hajime Shiota","doi":"10.1016/j.aquabot.2025.103898","DOIUrl":"10.1016/j.aquabot.2025.103898","url":null,"abstract":"<div><div>Light plays a crucial role in plant development and growth. Plants use photoreceptors to perceive light of varying wavelengths and intensities, translating these signals into photoresponses. In the marine environments where seagrasses grow, blue light is predominant due to the absorption of longer wavelengths by water. To elucidate the photoresponses of seagrasses, we analyzed the photoresponses of young seedlings of eelgrass (<em>Zostera marina</em>), whose genome analysis has confirmed the presence of photoreceptors. When cultured under white, blue, green, or red light, the coleoptiles were shorter, and de-etiolated primary leaves were observed. Conversely, under dark conditions, coleoptiles were elongated, and primary leaves did not emerge. These findings indicate that light reduces coleoptile elongation and promotes the emergence and de-etiolation of primary leaves. The reduction in coleoptile elongation was enhanced under intense blue light but diminished under strong red light. Additionally, primary leaf emergence was lowered under high red light conditions. The expression of photoreceptor genes (<em>ZoPHYA, ZoPHYB</em>, and <em>ZoCRY1</em>) was upregulated during seed germination, with <em>ZoPHYA</em> and <em>ZoCRY1</em> expression being particularly elevated at the coleoptile tips. Our results imply that, in young eelgrass seedlings, red and blue light are perceived at the coleoptile tips, triggering the transition from embryonic to vegetative growth. However, this transition is attenuated by intense red light. This response is likely to be an adaptive mechanism, enabling eelgrass to grow at optimal depths where blue light dominates.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"200 ","pages":"Article 103898"},"PeriodicalIF":1.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nickel tolerance and phytoremediation potential of the aquatic plant Lemna minuta and the cyanobacterium Trichormus variabilis in monoculture and consortium

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-04-04 DOI: 10.1016/j.aquabot.2025.103888

Valeria Carioti , Saverio Savio , Marco Fabriani , Neil T.W. Ellwood , Luca Gemin , Roberta Congestri , Maria Adelaide Iannelli , Simona Ceschin

One of the main threats to aquatic conservation is heavy metal pollution, with nickel (Ni) among the most significant contaminants. The Ni tolerance and remediation potential of Lemna minuta (vascular plant) and Trichormus variabilis (cyanobacterium) in contaminated water were investigated. The phytotoxic effects of nickel sulfate (NiSO₄·7 H₂O; 6.47 mg/L) on these two species, were assessed after 7- and 14-days exposure by measuring morphological changes, growth (fresh weight) and key physiological parameters (chlorophyll, malondialdehyde, protein content and catalase activity). The ability of L. minuta and T. variabilis to remove Ni was compared in both monoculture (single species) and consortium (mixed species) by measuring the reduction in Ni concentration in the culture medium. Nickel exposure induced phytotoxic effects in both species, as shown by decreases in fresh weight, chlorophyll and protein content, and increases in malondialdehyde content and catalase activity. These effects were more pronounced in monocultures, particularly in T. variabilis, compared to consortia. Lemna minuta exhibited good Ni tolerance and remediation capacity, removing 75 % and 86 % of the metal from the solution after 7 and 14 days, respectively. Trichormus variabilis removed 36 % and 27 % of the Ni after the same exposure time. Consortia exhibited high Ni removal, reaching 80 % and 90 % after 7 and 14 days, but this was not statistically different to L. minuta monocultures. These results demonstrate the potential of L. minuta in the remediation of Ni-contaminated waters and suggest that consortia might enhance the tolerance and viability of both species under Ni-stress.

{"title":"Nickel tolerance and phytoremediation potential of the aquatic plant Lemna minuta and the cyanobacterium Trichormus variabilis in monoculture and consortium","authors":"Valeria Carioti , Saverio Savio , Marco Fabriani , Neil T.W. Ellwood , Luca Gemin , Roberta Congestri , Maria Adelaide Iannelli , Simona Ceschin","doi":"10.1016/j.aquabot.2025.103888","DOIUrl":"10.1016/j.aquabot.2025.103888","url":null,"abstract":"<div><div>One of the main threats to aquatic conservation is heavy metal pollution, with nickel (Ni) among the most significant contaminants. The Ni tolerance and remediation potential of <em>Lemna minuta</em> (vascular plant) and <em>Trichormus variabilis</em> (cyanobacterium) in contaminated water were investigated. The phytotoxic effects of nickel sulfate (NiSO<sub>4</sub>·7 H<sub>2</sub>O; 6.47 mg/L) on these two species, were assessed after 7- and 14-days exposure by measuring morphological changes, growth (fresh weight) and key physiological parameters (chlorophyll, malondialdehyde, protein content and catalase activity). The ability of <em>L. minuta</em> and <em>T. variabilis</em> to remove Ni was compared in both monoculture (single species) and consortium (mixed species) by measuring the reduction in Ni concentration in the culture medium. Nickel exposure induced phytotoxic effects in both species, as shown by decreases in fresh weight, chlorophyll and protein content, and increases in malondialdehyde content and catalase activity. These effects were more pronounced in monocultures, particularly in <em>T. variabilis</em>, compared to consortia. <em>Lemna minuta</em> exhibited good Ni tolerance and remediation capacity, removing 75 % and 86 % of the metal from the solution after 7 and 14 days, respectively. <em>Trichormus variabilis</em> removed 36 % and 27 % of the Ni after the same exposure time. Consortia exhibited high Ni removal, reaching 80 % and 90 % after 7 and 14 days, but this was not statistically different to <em>L. minuta</em> monocultures. These results demonstrate the potential of <em>L. minuta</em> in the remediation of Ni-contaminated waters and suggest that consortia might enhance the tolerance and viability of both species under Ni-stress.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"200 ","pages":"Article 103888"},"PeriodicalIF":1.9,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic diversity and population structure of four Trapa species from the Yangtze River and Amur River basins, China 中国长江流域和阿穆尔河流域 4 个 Trapa 种的遗传多样性和种群结构

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-04-02 DOI: 10.1016/j.aquabot.2025.103887

Miriam Chepkwemoi Tengwer , Godfrey Kinyori Wagutu , Henry Kariuki Njeri , Wei Li , Yuan-Yuan Chen , Xiang-Rong Fan

Water chestnuts (Trapa L.) are annual floating-leaved macrophytes with significant economic and ecological values. Genetic information assessment of wild germplasm resources is essential to the effective utilization and cultivation breeding of this genus. Here, Expressed Sequence Tag-Simple sequence repeat (EST-SSR) markers were developed and used to evaluate the genetic diversity and population structure of the four common wild Trapa species from the two diversity centers of Trapa in China: the Yangtze River Basin (YRB) and the Amur River Basin (ARB). For the 12,178 EST-SSRs, the dinucleotide (55.3 %) was the predominant type. Using 19 primers, higher levels of genetic variation were detected in the two Trapa species from YRB (T. bispinosa: He= 0.530; T. quadrispinosa: He=0.498) than that of the species from ARB (T. manshurica: He = 0.279; T. maximowiczii: He=0.415). This might be attributed to the smaller population size and lower hydrological connectivity among populations for the two species of ARB. Correspondingly, the population differentiation levels within the two Trapa species in ARB (T. manshurica: F_ST=0.383; T. maximowiczii: F_ST=0.239) were higher than that of the species in YRB (T. bispinosa: F_ST=0.169; T. quadrispinosa: F_ST=0.124). The clustering analyses (UPGMA, PCoA and SRUCTURE) consistently showed that all the individuals were divided into three branches: the accessions from T. maximowiczii and T. manshurica were clustered based on their species origins; the same genetic group was shared by the individuals from T. bispinosa and T. quadrispinosa, which possessed similar fruit morphological characteristics in addition to the number of waist horns. Findings of this study suggested the Trapa populations with high genetic diversity should be prioritized for conservation in YRB, while each population should be equally protected because of obvious genetic differentiation among populations in ARB.

{"title":"Genetic diversity and population structure of four Trapa species from the Yangtze River and Amur River basins, China","authors":"Miriam Chepkwemoi Tengwer , Godfrey Kinyori Wagutu , Henry Kariuki Njeri , Wei Li , Yuan-Yuan Chen , Xiang-Rong Fan","doi":"10.1016/j.aquabot.2025.103887","DOIUrl":"10.1016/j.aquabot.2025.103887","url":null,"abstract":"<div><div>Water chestnuts (<em>Trapa</em> L.) are annual floating-leaved macrophytes with significant economic and ecological values. Genetic information assessment of wild germplasm resources is essential to the effective utilization and cultivation breeding of this genus. Here, Expressed Sequence Tag-Simple sequence repeat (EST-SSR) markers were developed and used to evaluate the genetic diversity and population structure of the four common wild <em>Trapa</em> species from the two diversity centers of <em>Trapa</em> in China: the Yangtze River Basin (YRB) and the Amur River Basin (ARB). For the 12,178 EST-SSRs, the dinucleotide (55.3 %) was the predominant type. Using 19 primers, higher levels of genetic variation were detected in the two <em>Trapa</em> species from YRB (<em>T. bispinosa</em>: <em>H</em>e= 0.530; <em>T. quadrispinosa</em>: <em>H</em>e=0.498) than that of the species from ARB (<em>T. manshurica</em>: <em>H</em>e = 0.279; <em>T. maximowiczii</em>: <em>H</em>e=0.415). This might be attributed to the smaller population size and lower hydrological connectivity among populations for the two species of ARB. Correspondingly, the population differentiation levels within the two <em>Trapa</em> species in ARB (<em>T. manshurica</em>: <em>F</em><sub>ST</sub>=0.383; <em>T. maximowiczii</em>: <em>F</em><sub>ST</sub>=0.239) were higher than that of the species in YRB (<em>T. bispinosa</em>: <em>F</em><sub>ST</sub>=0.169; <em>T. quadrispinosa</em>: <em>F</em><sub>ST</sub>=0.124). The clustering analyses (UPGMA, PCoA and SRUCTURE) consistently showed that all the individuals were divided into three branches: the accessions from <em>T. maximowiczii</em> and <em>T. manshurica</em> were clustered based on their species origins; the same genetic group was shared by the individuals from <em>T. bispinosa</em> and <em>T. quadrispinosa</em>, which possessed similar fruit morphological characteristics in addition to the number of waist horns. Findings of this study suggested the <em>Trapa</em> populations with high genetic diversity should be prioritized for conservation in YRB, while each population should be equally protected because of obvious genetic differentiation among populations in ARB.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"200 ","pages":"Article 103887"},"PeriodicalIF":1.9,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrative taxonomy reveals the presence of seagrass Ruppia brevipedunculata in India 综合分类法揭示了印度海草 Ruppia brevipedunculata 的存在

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-03-26 DOI: 10.1016/j.aquabot.2025.103886

M.S. Silpa , Amit Kumar , R. Giridharan , Prakash Sanjeevi

The seagrass genus Ruppia comprises eleven accepted species worldwide. In India, the genus is represented by a single species Ruppia maritima. However, recent studies indicated that the reported species of R. maritima in the Indo-Pacific region belongs to R. brevipedunculata. We have examined the specimen of Ruppia sp. from Pulicat Lake, India, and found that it belongs to R. brevipedunculata Shuo Yu & Hartog (2014) based on key morphological characters such as the short peduncle. Phylogenetic analysis of the maternal chloroplast maturase K (matK) gene and nuclear internal transcribed spacer (ITS) sequence ascertained the species identity as the specimen clustered with previously reported R. brevipedunculata.

引用次数: 0

The release of arsenic is a hidden risk during the in-situ decomposition of landed sargassum litter

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-03-25 DOI: 10.1016/j.aquabot.2025.103884

Bruno Chávez-Vergara , Elizabeth Solleiro-Rebolledo , Rafael López-Martínez , Ofelia Beltrán-Paz , Águeda E. Ceniceros-Gómez , Germán Yañez-Mendoza

Low molecular organic compounds and nutrients are released during the natural breakdown of plant tissues. However, if the organisms accumulate potentially toxic elements (PTE), these can be released into the environment; this is a latent risk during the decomposition of sargassum litter. This topic has been studied only in ex-situ conditions. We quantified the PTE concentration in fresh and in situ naturally decomposed sargassum litter. The results indicated that only arsenic demonstrates a high concentration in fresh biomass and litter across different stages of decomposition, exceeding 65 % initially, but decreasing to less than 20 % in the later stage concerning total As in each decomposition phase. These findings offer valuable insights into the release of As in leachates during natural decay and the residual As in partially decomposed sargassum litter.

引用次数: 0

Responses of an invasive plant Alternanthera philoxeroides to cadmium, nutrient availability and water temperature

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-03-24 DOI: 10.1016/j.aquabot.2025.103885

Zi-Yang Xie , Zhi-Hang Liu , Xin-Yue Gu, Yuan-Yuan Qin, Yu-Ting Du, Jin Yan, Rui Zhang, Chao Si

Introduced plant invasion, heavy metal pollution, eutrophication, and rising water temperatures collectively pose complex and severe environmental problems in freshwater ecosystems. Further clarification is needed on how invasive plants respond to these combined environmental stresses. We investigated the response of Alternanthera philoxeroides, a common invasive plant species in China, to two levels of cadmium concentration (0 or 1 mg L⁻¹ Cd²⁺), crossed with two levels of nutrient availability (0 or 10 mL L⁻¹ concentrated nutrient solution) and two levels of water temperature treatments (25 or 35 ℃). The presence of cadmium significantly inhibited the overall growth of A. philoxeroides, while the high nutrient level increased its growth. Temperature did not affect overall growth but primarily influenced branch number. There were statistically significant interactions between nutrient availability and temperature for several of our measurements; however, such significant interactions were not observed in the other two-way interactions. Overall, the high temperature enhanced the benefits derived from the high nutrient availability on the performance of A. philoxeroides. The three-way interaction only affected root-shoot ratio. The findings suggest that the high water temperature may exacerbate outbreaks of this invasive plant, particularly in freshwater habitats with high nutrient levels.

{"title":"Responses of an invasive plant Alternanthera philoxeroides to cadmium, nutrient availability and water temperature","authors":"Zi-Yang Xie , Zhi-Hang Liu , Xin-Yue Gu, Yuan-Yuan Qin, Yu-Ting Du, Jin Yan, Rui Zhang, Chao Si","doi":"10.1016/j.aquabot.2025.103885","DOIUrl":"10.1016/j.aquabot.2025.103885","url":null,"abstract":"<div><div>Introduced plant invasion, heavy metal pollution, eutrophication, and rising water temperatures collectively pose complex and severe environmental problems in freshwater ecosystems. Further clarification is needed on how invasive plants respond to these combined environmental stresses. We investigated the response of <em>Alternanthera philoxeroides</em>, a common invasive plant species in China, to two levels of cadmium concentration (0 or 1 mg L<sup>−1</sup> Cd<sup>2+</sup>), crossed with two levels of nutrient availability (0 or 10 mL L<sup>−1</sup> concentrated nutrient solution) and two levels of water temperature treatments (25 or 35 ℃). The presence of cadmium significantly inhibited the overall growth of <em>A. philoxeroides</em>, while the high nutrient level increased its growth. Temperature did not affect overall growth but primarily influenced branch number. There were statistically significant interactions between nutrient availability and temperature for several of our measurements; however, such significant interactions were not observed in the other two-way interactions. Overall, the high temperature enhanced the benefits derived from the high nutrient availability on the performance of <em>A. philoxeroides</em>. The three-way interaction only affected root-shoot ratio. The findings suggest that the high water temperature may exacerbate outbreaks of this invasive plant, particularly in freshwater habitats with high nutrient levels.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"199 ","pages":"Article 103885"},"PeriodicalIF":1.9,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An assessment of sulfide intrusion, genotypic diversity, and clone size in the seagrass Halodule wrightii

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-03-21 DOI: 10.1016/j.aquabot.2025.103882

Allyson Girard, Sebastian Rubiano-Rincon, Amanda Burton, Patrick D. Larkin

Genetic, including genotypic, diversity is positively associated with traits important for the maintenance of seagrass populations, while clonal reproduction has been shown to be correlated with an increased probability of survival, especially in stressful environments. We performed a pilot study to investigate the relationship between the intrusion of hydrogen sulfide (“sulfide”), an environmental phytotoxin, with genotypic diversity and clone size in the seagrass Halodule wrightii. Isotope ratio mass spectrometry (IRMS) was used to collect sulfur isotopic (δ³⁴S) data to measure sulfide intrusion in 143 root, rhizome, and leaf tissue samples from three sites in the western Gulf of Mexico. A series of microsatellite markers and gridded coordinates were used for genotyping, clonal type (single- vs multi-ramet) and size estimation. While individual genotypes varied for sulfide intrusion, multi-way ANOVA identified location to be a more important factor. Environmental attributes appear to have a more significant role than genotypic identity, clonal type, or size for sulfide uptake and distribution in this species.

{"title":"An assessment of sulfide intrusion, genotypic diversity, and clone size in the seagrass Halodule wrightii","authors":"Allyson Girard, Sebastian Rubiano-Rincon, Amanda Burton, Patrick D. Larkin","doi":"10.1016/j.aquabot.2025.103882","DOIUrl":"10.1016/j.aquabot.2025.103882","url":null,"abstract":"<div><div>Genetic, including genotypic, diversity is positively associated with traits important for the maintenance of seagrass populations, while clonal reproduction has been shown to be correlated with an increased probability of survival, especially in stressful environments. We performed a pilot study to investigate the relationship between the intrusion of hydrogen sulfide (“sulfide”), an environmental phytotoxin, with genotypic diversity and clone size in the seagrass <em>Halodule wrightii</em>. Isotope ratio mass spectrometry (IRMS) was used to collect sulfur isotopic (δ<sup>34</sup>S) data to measure sulfide intrusion in 143 root, rhizome, and leaf tissue samples from three sites in the western Gulf of Mexico. A series of microsatellite markers and gridded coordinates were used for genotyping, clonal type (single- vs multi-ramet) and size estimation. While individual genotypes varied for sulfide intrusion, multi-way ANOVA identified location to be a more important factor. Environmental attributes appear to have a more significant role than genotypic identity, clonal type, or size for sulfide uptake and distribution in this species.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"199 ","pages":"Article 103882"},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New records of red algae (Rhodophyta) from the intertidal rocky shore of Visakhapatnam coast of Bay of Bengal, India

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-03-13 DOI: 10.1016/j.aquabot.2025.103883

A. Sakshi Rao, Swathi Pattigundla, Rama Ravi Teja Kosuri, Brajogopal Samanta

In the present study, we identified nine red algal species from the intertidal rocky shore of the Visakhapatnam coast, Bay of Bengal, India, using an integrated taxonomic approach, including morphological, anatomical, and multigene phylogenetic analyses based on SSU rDNA, rbcL, and COI gene markers. Seven of them were the new records to the study area, including Centroceras gasparrinii, Gelidium nayaritense, Pterocladiella bartlettii, Hypnea charoides, Hypnea cf. edeniana, Gracilaria multifurcata, and Gracilaria rangiferina. Of these seven species, P. bartlettii, G. multifurcata, and G. rangiferina were new records to the Bay of Bengal coast, whereas H. cf. edeniana and G. nayaritense were new records to the Indian Ocean. Our result suggested that red algal species cataloging is still under-representation in the study area. In the future, systematic sampling strategies from different tidal zones across different times of the year may report more new records and new species of red algae from this coastline.

{"title":"New records of red algae (Rhodophyta) from the intertidal rocky shore of Visakhapatnam coast of Bay of Bengal, India","authors":"A. Sakshi Rao, Swathi Pattigundla, Rama Ravi Teja Kosuri, Brajogopal Samanta","doi":"10.1016/j.aquabot.2025.103883","DOIUrl":"10.1016/j.aquabot.2025.103883","url":null,"abstract":"<div><div>In the present study, we identified nine red algal species from the intertidal rocky shore of the Visakhapatnam coast, Bay of Bengal, India, using an integrated taxonomic approach, including morphological, anatomical, and multigene phylogenetic analyses based on SSU rDNA, <em>rbc</em>L, and COI gene markers. Seven of them were the new records to the study area, including <em>Centroceras gasparrinii, Gelidium nayaritense, Pterocladiella bartlettii, Hypnea charoides, Hypnea</em> cf. <em>edeniana, Gracilaria multifurcata, and Gracilaria rangiferina.</em> Of these seven species, <em>P. bartlettii</em>, <em>G. multifurcata</em>, and <em>G. rangiferina</em> were new records to the Bay of Bengal coast, whereas <em>H.</em> cf. <em>edeniana</em> and <em>G. nayaritense</em> were new records to the Indian Ocean. Our result suggested that red algal species cataloging is still under-representation in the study area. In the future, systematic sampling strategies from different tidal zones across different times of the year may report more new records and new species of red algae from this coastline.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"199 ","pages":"Article 103883"},"PeriodicalIF":1.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Not regionally extinct: Rediscovery of Ruppia drepanensis in Portugal, the westernmost range edge in Europe

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-03-10 DOI: 10.1016/j.aquabot.2025.103881

Duarte G. Frade , João Neiva , Jose Martínez-Garrido , Anne Davison , Luca Caminiti , Gonçalo G. Ramos , Gareth A. Pearson , Ester A. Serrão

Ruppia drepanensis Tineo ex Guss. is an important habitat-forming aquatic plant in saline and brackish Mediterranean wetlands. The species is declining in several parts of its range due to hydrological changes and habitat degradation. R. drepanensis was considered Critically Endangered, possibly Regionally Extinct in Portugal, due to not being observed since 1986 despite extensive surveys of suitable habitat. We report on a new population, the westernmost known record for the species in Europe, identified with morphological and molecular data. Despite being inside a protected area, this population occupies a single small pond adjacent to a road, making it vulnerable to habitat changes. Ex situ conservation is recommended, including seed banking and/or the establishment of new populations.

引用次数: 0

Hydrological suitability for mangrove species in restored mangroves in abandoned ponds

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany

Pub Date : 2025-02-25 DOI: 10.1016/j.aquabot.2025.103873

Frida Sidik , Mohammad Basyuni , Novia Arinda Pradisty , Rizki Hanintyo , Nuryani Widagti , Bayu Priyono , Rizka Amelia , Paul Macklin , Nyoman Surana , Bejo Slamet

Mangrove restoration projects in Indonesia are widely conducted in abandoned aquaculture ponds, however the success of planting mangroves is limited as tidal flooding is often not considered. The hydrology of mangrove surrounding water is both complex and dynamic and creates tide-induced flow and mangrove vegetation interaction that influences hydrological suitability of mangrove species. In this study, we aimed to determine the hydrological suitability for specific mangrove species in mangrove restoration efforts in abandoned aquaculture ponds by measuring tidal inundation duration in mangrove waters. The study was undertaken in two restored mangroves sites in abandoned ponds in Perancak estuary, Bali and Lubuk Kertang, North Sumatra, which was combined with measurements of intact mangroves for comparison. Tidal flooding (inundation and current velocity) was recorded to obtain flooding period measurements (depth, duration and tidal velocity) in association with mangrove succession rates. We found that the variability of tidal flooding between study sites was found to determine dominant mangrove species, suggesting a mangrove species-specific tolerance to tidal flooding in establishing habitats. Among the species observed, Nypa fruticans was found to be the most resilient to prolonged tidal inundations. Rhizophora spp., Avicennia spp., Sonneratia alba, however, adapted to a wider range of inundation periods. The tidal inundation in restored mangrove ponds was characterized by low current velocities, which provides suitable conditions for mangrove recovery in restoration sites. This information on hydrological classification proves that the effectiveness of mangrove restoration projects can be improved by highlighting the necessity to account for localized tidal inundation regimes.

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