Thalita Neves Marostega, S. P. Sobrinho, P. B. Luz
Este trabalho teve como finalidade estimar a diversidade genética entre acessos de maracujazeiros conservados na coleção de trabalho da Universidade do Estado de Mato Grosso, com base em descritores morfoagronômicos. O experimento foi conduzido em delineamento de blocos ao acaso, com quatro repetições, quatro plantas por parcela. Foi gerada uma matriz de dissimilaridade fundamentada no complemento do coeficiente de coincidência simples. De acordo com os valores da matriz de dissimilaridade, os acessos Passiflora morifolia e Passiflora foetida foram os mais similares (dii’ 0,25), enquanto os acessos Passiflora quadrangularis e Passiflora suberosa foram os mais distantes (dii’ 0,88). Os acessos mais divergentes com base no método unweighted pair-group method with arithmetic averages (UPGMA) foram P. foetida e Passiflora edulis, sendo ambos pertencentes a subgêneros distintos.
{"title":"Diversidade genética entre acessos de maracujazeiros com base em descritores morfoagronômicos","authors":"Thalita Neves Marostega, S. P. Sobrinho, P. B. Luz","doi":"10.21726/ABC.V8I1.815","DOIUrl":"https://doi.org/10.21726/ABC.V8I1.815","url":null,"abstract":"Este trabalho teve como finalidade estimar a diversidade genética entre acessos de maracujazeiros conservados na coleção de trabalho da Universidade do Estado de Mato Grosso, com base em descritores morfoagronômicos. O experimento foi conduzido em delineamento de blocos ao acaso, com quatro repetições, quatro plantas por parcela. Foi gerada uma matriz de dissimilaridade fundamentada no complemento do coeficiente de coincidência simples. De acordo com os valores da matriz de dissimilaridade, os acessos Passiflora morifolia e Passiflora foetida foram os mais similares (dii’ 0,25), enquanto os acessos Passiflora quadrangularis e Passiflora suberosa foram os mais distantes (dii’ 0,88). Os acessos mais divergentes com base no método unweighted pair-group method with arithmetic averages (UPGMA) foram P. foetida e Passiflora edulis, sendo ambos pertencentes a subgêneros distintos.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"85 1","pages":"4-10"},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88927422","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}
Alfred Johann Santos Becker, Vanessa Neumann Silva
A alface é uma hortaliça de grande produção e consumo e propagada via sementes. A presente pesquisa visou avaliar a influência no tratamento de sementes de alface de diferentes cultivares de bioestimulantes à base de algas, na germinação e no desenvolvimento de plântulas. Foram utilizados bioestimulantes das algas Ascophyllum nodosum e Solieria spp. O delineamento experimental usado foi inteiramente casualizado, em esquema fatorial 3 × 4 (cultivares e doses), separadamente, para cada bioestimulante, com cinco repetições. Utilizaram-se as cultivares de alface Batavia Cacimba, Grand Rapids e Itapuã Super, e as doses de 0, 1, 2 e 4 mL.L-1. O desempenho das sementes foi avaliado por meio de: teste de germinação, índice de velocidade de germinação, comprimento de raízes e de parte aérea e massa seca de plântulas. Os dados obtidos foram submetidos a análise de variância, teste de Tukey, para comparação de cultivares (p < 0,05), e análise de regressão, para avaliação do fator doses. As doses de bioestimulantes à base de A. nodosum e Solieria spp. utilizadas nesta pesquisa não promoveram melhoria na germinação nem no desenvolvimento de plântulas de diferentes cultivares de alface. As cultivares de alface responderam de forma diferenciada ao tratamento de sementes com bioestimulantes de algas marrom e vermelha.
{"title":"Tratamento de sementes de alface com bioestimulantes à base de algas","authors":"Alfred Johann Santos Becker, Vanessa Neumann Silva","doi":"10.21726/ABC.V8I1.817","DOIUrl":"https://doi.org/10.21726/ABC.V8I1.817","url":null,"abstract":"A alface é uma hortaliça de grande produção e consumo e propagada via sementes. A presente pesquisa visou avaliar a influência no tratamento de sementes de alface de diferentes cultivares de bioestimulantes à base de algas, na germinação e no desenvolvimento de plântulas. Foram utilizados bioestimulantes das algas Ascophyllum nodosum e Solieria spp. O delineamento experimental usado foi inteiramente casualizado, em esquema fatorial 3 × 4 (cultivares e doses), separadamente, para cada bioestimulante, com cinco repetições. Utilizaram-se as cultivares de alface Batavia Cacimba, Grand Rapids e Itapuã Super, e as doses de 0, 1, 2 e 4 mL.L-1. O desempenho das sementes foi avaliado por meio de: teste de germinação, índice de velocidade de germinação, comprimento de raízes e de parte aérea e massa seca de plântulas. Os dados obtidos foram submetidos a análise de variância, teste de Tukey, para comparação de cultivares (p < 0,05), e análise de regressão, para avaliação do fator doses. As doses de bioestimulantes à base de A. nodosum e Solieria spp. utilizadas nesta pesquisa não promoveram melhoria na germinação nem no desenvolvimento de plântulas de diferentes cultivares de alface. As cultivares de alface responderam de forma diferenciada ao tratamento de sementes com bioestimulantes de algas marrom e vermelha.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"60 1","pages":"11-17"},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73012880","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}
Talyta Mytsuy Zanardini Galeski Sens, Jaqueline Aparecida Schran, Ana Paula Vantroba, Íris Cristina Bertolini, L. F. Watzlawick, S. Lustosa
Avaliou-se a dinâmica florestal, em termos de incrementos, ingresso e mortalidade, de duas áreas, uma de floresta secundária e outra sob sistema silvipastoril, no município de Turvo (PR). Para o levantamento, foram medidas parcelas permanentes totalizando 1,68 e 1,8 ha, respectivamente. Todos os indivíduos com diâmetro à altura do peito maior que 5 cm foram considerados. Utilizou-se o centro de classe para análise das espécies por meio da cadeia de Markov. No ano de 2018, a floresta secundária apresentou 1.531 ind./ha-1, distribuídos em 33 famílias, 52 gêneros e 69 espécies. Já o sistema silvipastoril apresentou 594 ind./ha-1, com 22 famílias, 31 gêneros e 43 espécies. A distribuição diamétrica entre as áreas mostrou diferenças no número de indivíduos nas classes de 5 a 20 cm. O incremento de 2012 a 2018 foi de 6,11 m2 ha-1 na floresta e de 5,33 m2 ha-1 no silvipastoril. Concluiu-se que as áreas apresentam regeneração natural, evidenciada pelo padrão de distribuição diamétrica, e, apesar de ter menor número de ingressos, a área silvipastoril teve incremento periódico superior ao da área de floresta secundária. A área silvipastoril é prejudicada por ações antrópicas, de animais e climáticas, fatores que acentuam ainda mais a necessidade de estratégias de manejo para a sua conservação.
{"title":"Dinâmica florestal em floresta ombrófila mista secundária e sistema silvipastoril","authors":"Talyta Mytsuy Zanardini Galeski Sens, Jaqueline Aparecida Schran, Ana Paula Vantroba, Íris Cristina Bertolini, L. F. Watzlawick, S. Lustosa","doi":"10.21726/ABC.V8I1.819","DOIUrl":"https://doi.org/10.21726/ABC.V8I1.819","url":null,"abstract":"Avaliou-se a dinâmica florestal, em termos de incrementos, ingresso e mortalidade, de duas áreas, uma de floresta secundária e outra sob sistema silvipastoril, no município de Turvo (PR). Para o levantamento, foram medidas parcelas permanentes totalizando 1,68 e 1,8 ha, respectivamente. Todos os indivíduos com diâmetro à altura do peito maior que 5 cm foram considerados. Utilizou-se o centro de classe para análise das espécies por meio da cadeia de Markov. No ano de 2018, a floresta secundária apresentou 1.531 ind./ha-1, distribuídos em 33 famílias, 52 gêneros e 69 espécies. Já o sistema silvipastoril apresentou 594 ind./ha-1, com 22 famílias, 31 gêneros e 43 espécies. A distribuição diamétrica entre as áreas mostrou diferenças no número de indivíduos nas classes de 5 a 20 cm. O incremento de 2012 a 2018 foi de 6,11 m2 ha-1 na floresta e de 5,33 m2 ha-1 no silvipastoril. Concluiu-se que as áreas apresentam regeneração natural, evidenciada pelo padrão de distribuição diamétrica, e, apesar de ter menor número de ingressos, a área silvipastoril teve incremento periódico superior ao da área de floresta secundária. A área silvipastoril é prejudicada por ações antrópicas, de animais e climáticas, fatores que acentuam ainda mais a necessidade de estratégias de manejo para a sua conservação.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"59 1","pages":"18-34"},"PeriodicalIF":0.6,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83421372","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}
Pub Date : 2021-02-24DOI: 10.38201/BTHA.ABC.V51.I1.4
M. J. D. Toit, C. D. Preez, S. Cilliers
Background: Wetlands are the most threatened ecosystem in South Africa despite the range of ecosystem goods and services they provide. A significant cause of wetland destruction and degradation is a lack of understanding, by planners, policymakers and developers, of their ecological and socio-economic importance.Objectives: This study assessed the floristic composition and diversity of wetlands in the former Tlokwe Municipal area along a rural–urban gradient.Methods: Fourteen wetland sites were surveyed along an urbanisation gradient. Vegetation surveys were done in quadrats along transects in each wetland recording the cover-abundance of each species. The data were analysed by using ordinations, similarity percentages, and the adjusted Floristic Quality Assessment Index.Results: Overall, the proportional species composition of urban and rural wetlands was mainly similar. Trends indicated that the alpha diversity increased with both habitat size and heterogeneity along a rural–urban gradient. In all wetlands, indigenous species were the most abundant, with the highest score in the largest urban wetland. The floristic quality varied widely along the gradient with none of the sites in pristine condition.Conclusion: The similarity in species composition and floristic quality of the wetlands, as well as the high levels of indigenous species richness, indicated that urban wetlands are worthy of conservation. However, the signs of disturbances and the presence of alien species means that restoration strategies need to be implemented to improve the quality of the wetlands.
{"title":"Plant diversity and conservation value of wetlands along a rural–urban gradient","authors":"M. J. D. Toit, C. D. Preez, S. Cilliers","doi":"10.38201/BTHA.ABC.V51.I1.4","DOIUrl":"https://doi.org/10.38201/BTHA.ABC.V51.I1.4","url":null,"abstract":"Background: Wetlands are the most threatened ecosystem in South Africa despite the range of ecosystem goods and services they provide. A significant cause of wetland destruction and degradation is a lack of understanding, by planners, policymakers and developers, of their ecological and socio-economic importance.Objectives: This study assessed the floristic composition and diversity of wetlands in the former Tlokwe Municipal area along a rural–urban gradient.Methods: Fourteen wetland sites were surveyed along an urbanisation gradient. Vegetation surveys were done in quadrats along transects in each wetland recording the cover-abundance of each species. The data were analysed by using ordinations, similarity percentages, and the adjusted Floristic Quality Assessment Index.Results: Overall, the proportional species composition of urban and rural wetlands was mainly similar. Trends indicated that the alpha diversity increased with both habitat size and heterogeneity along a rural–urban gradient. In all wetlands, indigenous species were the most abundant, with the highest score in the largest urban wetland. The floristic quality varied widely along the gradient with none of the sites in pristine condition.Conclusion: The similarity in species composition and floristic quality of the wetlands, as well as the high levels of indigenous species richness, indicated that urban wetlands are worthy of conservation. However, the signs of disturbances and the presence of alien species means that restoration strategies need to be implemented to improve the quality of the wetlands.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"40 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74222868","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}
Pub Date : 2021-02-24DOI: 10.38201/BTHA.ABC.V51.I1.2
S. Cilliers, S. V. Vuuren, Klaus Kellner, G. Krüger, M. Struwig, C.J.G van Niekerk, Stefan J. Siebert
The Department of Botany on the Potchefstroom Campus (formerly Potchefstroom University for Christian Higher Education) of the North-West University (NWU) had its centenary in 2020. In this paper we celebrate this milestone by giving an overview of the history of the Department at this campus, including its recent establishment and expansion on the NWU Mahikeng Campus (formerly the University of North-West). A brief overview is presented of the advances in teaching and research over the years, and the development and relevance of the important plant collections in the botanical garden, two herbaria and the national diatom collection. The main emphasis of this contribution is, however, a reflection on the advancement and significance of research conducted by various disciplines on plant and algae function, diversity and ecological restoration over the years. The different disciplines in Botany at NWU, from the oldest to the more recent, are Plant Taxonomy, Plant Ecophysiology, Terrestrial Plant Ecology, Aquatic Sciences, Urban and Settlement Ecology, Geoecology, and Proteomics. Different aspects contributing to changes occurring in the environment, such as pollution, land degradation, urbanisation, overexploitation of resources and the subsequent effect of these on plant diversity and function are especially addressed in our current research. The results of our research inter alia led to solutions for problems occurring in the landscape and contribute to the well-being of the people using the land and water by restoring important ecosystem services.
{"title":"Hundred years of Botany at the NWU: contributions towards understanding plant and algae function, diversity and restoration in a changing environment","authors":"S. Cilliers, S. V. Vuuren, Klaus Kellner, G. Krüger, M. Struwig, C.J.G van Niekerk, Stefan J. Siebert","doi":"10.38201/BTHA.ABC.V51.I1.2","DOIUrl":"https://doi.org/10.38201/BTHA.ABC.V51.I1.2","url":null,"abstract":"The Department of Botany on the Potchefstroom Campus (formerly Potchefstroom University for Christian Higher Education) of the North-West University (NWU) had its centenary in 2020. In this paper we celebrate this milestone by giving an overview of the history of the Department at this campus, including its recent establishment and expansion on the NWU Mahikeng Campus (formerly the University of North-West). A brief overview is presented of the advances in teaching and research over the years, and the development and relevance of the important plant collections in the botanical garden, two herbaria and the national diatom collection. The main emphasis of this contribution is, however, a reflection on the advancement and significance of research conducted by various disciplines on plant and algae function, diversity and ecological restoration over the years. The different disciplines in Botany at NWU, from the oldest to the more recent, are Plant Taxonomy, Plant Ecophysiology, Terrestrial Plant Ecology, Aquatic Sciences, Urban and Settlement Ecology, Geoecology, and Proteomics. Different aspects contributing to changes occurring in the environment, such as pollution, land degradation, urbanisation, overexploitation of resources and the subsequent effect of these on plant diversity and function are especially addressed in our current research. The results of our research inter alia led to solutions for problems occurring in the landscape and contribute to the well-being of the people using the land and water by restoring important ecosystem services.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"15 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81246423","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}
Pub Date : 2021-02-24DOI: 10.38201/BTHA.ABC.V51.I1.11
M. Muller, S. Siebert, B. Ntloko, F. Siebert
Background: Land-use effects on grassland flora are difficult to predict due to poor understanding of species losses caused by transformation.Objectives: To determine changes in species diversity and composition by comparing transformed with untransformed grassland.Methods: Floristics of paired plots were sampled within 18 transformed sites (representing agricultural and urban land-uses) and neighbouring untransformed grassland.Results: Endemic and threatened species were negatively affected by transformation, particularly species with belowground bud-banks and storage organs. Species composition, with clear shifts in dominant families, was changed by over 90% on average by transformation.Conclusion: Land-use transformation leads to the loss of native species and increased alien invasive species.
{"title":"A floristic assessment of grassland diversity loss in South Africa","authors":"M. Muller, S. Siebert, B. Ntloko, F. Siebert","doi":"10.38201/BTHA.ABC.V51.I1.11","DOIUrl":"https://doi.org/10.38201/BTHA.ABC.V51.I1.11","url":null,"abstract":"Background: Land-use effects on grassland flora are difficult to predict due to poor understanding of species losses caused by transformation.Objectives: To determine changes in species diversity and composition by comparing transformed with untransformed grassland.Methods: Floristics of paired plots were sampled within 18 transformed sites (representing agricultural and urban land-uses) and neighbouring untransformed grassland.Results: Endemic and threatened species were negatively affected by transformation, particularly species with belowground bud-banks and storage organs. Species composition, with clear shifts in dominant families, was changed by over 90% on average by transformation.Conclusion: Land-use transformation leads to the loss of native species and increased alien invasive species.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"6 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75792115","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}
Pub Date : 2021-02-24DOI: 10.38201/BTHA.ABC.V51.I1.1
E. Andersson
Andersson, E., 2021, ‘Knowledge for a different urban future: a reflection’, Guest editorial, Bothalia 51(1), a1. http://dx.doi. org/10.38201/btha.abc.v51.i1.1 Commemorative issue celebrating 100 years of Botany on the Potchefstroom campus of the NorthWest University: past and present contributions to understand the impact of land-use change on algal and plant diversity in aquatic and terrestrial ecosystems.
{"title":"Knowledge for a different urban future: a reflection","authors":"E. Andersson","doi":"10.38201/BTHA.ABC.V51.I1.1","DOIUrl":"https://doi.org/10.38201/BTHA.ABC.V51.I1.1","url":null,"abstract":"Andersson, E., 2021, ‘Knowledge for a different urban future: a reflection’, Guest editorial, Bothalia 51(1), a1. http://dx.doi. org/10.38201/btha.abc.v51.i1.1 Commemorative issue celebrating 100 years of Botany on the Potchefstroom campus of the NorthWest University: past and present contributions to understand the impact of land-use change on algal and plant diversity in aquatic and terrestrial ecosystems.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"4 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87310738","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}
Pub Date : 2021-02-24DOI: 10.38201/BTHA.ABC.V51.I1.9
J. Berner, H. Cloete, T. Shuuya
Background: Welwitschia mirabilis is highly specialised to survive the harsh climate of the Namib Desert. Changes in land use, such as the expansion of mining activities, may endanger their survival.Objectives: The purpose of this study was to understand the photosynthetic potential of W. mirabilis plants to provide a baseline for future long-term monitoring, and for future comparison to determine plant health status after the onset of mining operations.Methods: The study was conducted in a population of W. mirabilis on the Welwitschia Plains. Chlorophyll a fluorescence data were used to measure plant photochemical potential and analysed using the JIP-test.Results: Significant differences in the photosynthetic potential was observed for W. mirabilis plants located in different catchments. The partial parameters of the PIABS values were also significantly lower, which indicated that all aspects of photosynthesis were influenced.Conclusion: PIABS values can serve as a baseline for future long-term monitoring studies to detect any changes in the health status of W. mirabilis that might result from land use change.
{"title":"A baseline assessment of the photosynthetic potential of Welwitschia mirabilis using the JIP-test for monitoring and conservation purposes","authors":"J. Berner, H. Cloete, T. Shuuya","doi":"10.38201/BTHA.ABC.V51.I1.9","DOIUrl":"https://doi.org/10.38201/BTHA.ABC.V51.I1.9","url":null,"abstract":"Background: Welwitschia mirabilis is highly specialised to survive the harsh climate of the Namib Desert. Changes in land use, such as the expansion of mining activities, may endanger their survival.Objectives: The purpose of this study was to understand the photosynthetic potential of W. mirabilis plants to provide a baseline for future long-term monitoring, and for future comparison to determine plant health status after the onset of mining operations.Methods: The study was conducted in a population of W. mirabilis on the Welwitschia Plains. Chlorophyll a fluorescence data were used to measure plant photochemical potential and analysed using the JIP-test.Results: Significant differences in the photosynthetic potential was observed for W. mirabilis plants located in different catchments. The partial parameters of the PIABS values were also significantly lower, which indicated that all aspects of photosynthesis were influenced.Conclusion: PIABS values can serve as a baseline for future long-term monitoring studies to detect any changes in the health status of W. mirabilis that might result from land use change.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"68 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86118213","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}
Pub Date : 2021-02-24DOI: 10.38201/BTHA.ABC.V51.I1.7
K. Kellner, Reletile T. Mangani, T. Sebitloane, J. Chirima, N. Meyer, Hendri Coetzee, P. Malan, Jaco Koch
Background: One of the main causes of land degradation in South Africa is bush thickening (BT) of mainly Senegalia or Vachellia species. Restoration methods are required to control BT, and to improve grass biomass production and soil conditions in South Africa.Objectives: The objectives of this study were to determine the effect of brush packing (BP) as a restoration method to increase grass biomass production, assess soil moisture after BP on different soil types, and document the perceptions of the local communities towards BP.Method: Methods included cutting the stems of woodies with a diameter of at least 10 cm at knee height by chainsaw and manual clipping after which an arborocide was applied to the stumps. A neutron probe was used to measure volumetric moisture content at two different soil depths. The grass biomass was analysed using ANOVA at a confidence level of 95%. Quantitative and qualitative approaches were used to gather information about the perceptions of local communities towards restoration in group discussions.Results: The short-term data showed that the implementation of BP as restoration method increased grass biomass production. The soil texture influenced the volumetric soil moisture. Higher soil moisture content was found in the deeper clayey soils. The local participants’ interpretation towards the restoration project was positive.Conclusion: The project increased the grazing potential and contributed to job creation to improve the well-being of the people in the community.
{"title":"Restoration after bush control in selected rangeland areas of semi-arid savannas in South Africa","authors":"K. Kellner, Reletile T. Mangani, T. Sebitloane, J. Chirima, N. Meyer, Hendri Coetzee, P. Malan, Jaco Koch","doi":"10.38201/BTHA.ABC.V51.I1.7","DOIUrl":"https://doi.org/10.38201/BTHA.ABC.V51.I1.7","url":null,"abstract":"Background: One of the main causes of land degradation in South Africa is bush thickening (BT) of mainly Senegalia or Vachellia species. Restoration methods are required to control BT, and to improve grass biomass production and soil conditions in South Africa.Objectives: The objectives of this study were to determine the effect of brush packing (BP) as a restoration method to increase grass biomass production, assess soil moisture after BP on different soil types, and document the perceptions of the local communities towards BP.Method: Methods included cutting the stems of woodies with a diameter of at least 10 cm at knee height by chainsaw and manual clipping after which an arborocide was applied to the stumps. A neutron probe was used to measure volumetric moisture content at two different soil depths. The grass biomass was analysed using ANOVA at a confidence level of 95%. Quantitative and qualitative approaches were used to gather information about the perceptions of local communities towards restoration in group discussions.Results: The short-term data showed that the implementation of BP as restoration method increased grass biomass production. The soil texture influenced the volumetric soil moisture. Higher soil moisture content was found in the deeper clayey soils. The local participants’ interpretation towards the restoration project was positive.Conclusion: The project increased the grazing potential and contributed to job creation to improve the well-being of the people in the community.","PeriodicalId":55336,"journal":{"name":"Bothalia","volume":"323 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85794242","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}
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