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description Publicationkeyboard_double_arrow_right Article 2024 Denmark, FrancePublisher:Wiley Authors:Wieckowski, Aleksander;
Wieckowski, Aleksander
Wieckowski, Aleksander in OpenAIREVestin, Patrik;
Vestin, Patrik
Vestin, Patrik in OpenAIREArdö, Jonas;
Ardö, Jonas
Ardö, Jonas in OpenAIRERoupsard, Olivier;
+8 AuthorsRoupsard, Olivier
Roupsard, Olivier in OpenAIREWieckowski, Aleksander;
Wieckowski, Aleksander
Wieckowski, Aleksander in OpenAIREVestin, Patrik;
Vestin, Patrik
Vestin, Patrik in OpenAIREArdö, Jonas;
Ardö, Jonas
Ardö, Jonas in OpenAIRERoupsard, Olivier;
Ndiaye, Ousmane; Diatta, Ousmane; Ba, Seydina;Roupsard, Olivier
Roupsard, Olivier in OpenAIREAgbohessou, Yélognissè;
Fensholt, Rasmus;Agbohessou, Yélognissè
Agbohessou, Yélognissè in OpenAIREVerbruggen, Wim;
Verbruggen, Wim
Verbruggen, Wim in OpenAIREGebremedhn, Haftay Hailu;
Tagesson, Torbern;Gebremedhn, Haftay Hailu
Gebremedhn, Haftay Hailu in OpenAIREdoi: 10.1111/gcb.17509
pmid: 39323398
AbstractMonitoring the changes of ecosystem functioning is pivotal for understanding the global carbon cycle. Despite its size and contribution to the global carbon cycle, Africa is largely understudied in regard to ongoing changes of its ecosystem functioning and their responses to climate change. One of the reasons is the lack of long‐term in situ data. Here, we use eddy covariance to quantify the net ecosystem exchange (NEE) and its components—gross primary production (GPP) and ecosystem respiration (Reco) for years 2010–2022 for a Sahelian semiarid savanna to study trends in the fluxes. Significant negative trends were found for NEE (12.7 ± 2.8 g C m2 year−1), GPP (39.6 ± 7.9 g C m2 year−1), and Reco (32.2 ± 8.9 g C m2 year−1). We found that NEE decreased by 60% over the study period, and this decrease was mainly caused by stronger negative trends in rainy season GPP than in Reco. Additionally, we observed strong increasing trends in vapor pressure deficit, but no trends in rainfall or soil water content. Thus, a proposed explanation for the decrease in carbon sink strength is increasing atmospheric dryness. The warming climate in the Sahel, coupled with increasing evaporative demand, may thus lead to decreased GPP levels across this biome, and lowering its CO2 sequestration.
Institut National de... arrow_drop_down Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Full-Text: https://doi.org/10.5061/dryad.3ffbg79t0Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2024Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2024Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/gcb.17509&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 2 citations 2 popularity Average influence Average impulse Average Powered by BIP!
more_vert Institut National de... arrow_drop_down Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Full-Text: https://doi.org/10.5061/dryad.3ffbg79t0Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2024Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2024Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/gcb.17509&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2024 Denmark, FrancePublisher:Wiley Authors:Wieckowski, Aleksander;
Wieckowski, Aleksander
Wieckowski, Aleksander in OpenAIREVestin, Patrik;
Vestin, Patrik
Vestin, Patrik in OpenAIREArdö, Jonas;
Ardö, Jonas
Ardö, Jonas in OpenAIRERoupsard, Olivier;
+8 AuthorsRoupsard, Olivier
Roupsard, Olivier in OpenAIREWieckowski, Aleksander;
Wieckowski, Aleksander
Wieckowski, Aleksander in OpenAIREVestin, Patrik;
Vestin, Patrik
Vestin, Patrik in OpenAIREArdö, Jonas;
Ardö, Jonas
Ardö, Jonas in OpenAIRERoupsard, Olivier;
Ndiaye, Ousmane; Diatta, Ousmane; Ba, Seydina;Roupsard, Olivier
Roupsard, Olivier in OpenAIREAgbohessou, Yélognissè;
Fensholt, Rasmus;Agbohessou, Yélognissè
Agbohessou, Yélognissè in OpenAIREVerbruggen, Wim;
Verbruggen, Wim
Verbruggen, Wim in OpenAIREGebremedhn, Haftay Hailu;
Tagesson, Torbern;Gebremedhn, Haftay Hailu
Gebremedhn, Haftay Hailu in OpenAIREdoi: 10.1111/gcb.17509
pmid: 39323398
AbstractMonitoring the changes of ecosystem functioning is pivotal for understanding the global carbon cycle. Despite its size and contribution to the global carbon cycle, Africa is largely understudied in regard to ongoing changes of its ecosystem functioning and their responses to climate change. One of the reasons is the lack of long‐term in situ data. Here, we use eddy covariance to quantify the net ecosystem exchange (NEE) and its components—gross primary production (GPP) and ecosystem respiration (Reco) for years 2010–2022 for a Sahelian semiarid savanna to study trends in the fluxes. Significant negative trends were found for NEE (12.7 ± 2.8 g C m2 year−1), GPP (39.6 ± 7.9 g C m2 year−1), and Reco (32.2 ± 8.9 g C m2 year−1). We found that NEE decreased by 60% over the study period, and this decrease was mainly caused by stronger negative trends in rainy season GPP than in Reco. Additionally, we observed strong increasing trends in vapor pressure deficit, but no trends in rainfall or soil water content. Thus, a proposed explanation for the decrease in carbon sink strength is increasing atmospheric dryness. The warming climate in the Sahel, coupled with increasing evaporative demand, may thus lead to decreased GPP levels across this biome, and lowering its CO2 sequestration.
Institut National de... arrow_drop_down Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Full-Text: https://doi.org/10.5061/dryad.3ffbg79t0Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2024Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2024Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/gcb.17509&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 2 citations 2 popularity Average influence Average impulse Average Powered by BIP!
more_vert Institut National de... arrow_drop_down Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Full-Text: https://doi.org/10.5061/dryad.3ffbg79t0Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2024Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2024Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/gcb.17509&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 Germany, Denmark, FrancePublisher:Springer Science and Business Media LLC Authors:Haftay Hailu Gebremedhn;
Haftay Hailu Gebremedhn
Haftay Hailu Gebremedhn in OpenAIREOusmane Ndiaye;
Ousmane Ndiaye
Ousmane Ndiaye in OpenAIRESylvanus Mensah;
Sylvanus Mensah
Sylvanus Mensah in OpenAIRECofélas Fassinou;
+3 AuthorsCofélas Fassinou
Cofélas Fassinou in OpenAIREHaftay Hailu Gebremedhn;
Haftay Hailu Gebremedhn
Haftay Hailu Gebremedhn in OpenAIREOusmane Ndiaye;
Ousmane Ndiaye
Ousmane Ndiaye in OpenAIRESylvanus Mensah;
Sylvanus Mensah
Sylvanus Mensah in OpenAIRECofélas Fassinou;
Cofélas Fassinou
Cofélas Fassinou in OpenAIRESimon Taugourdeau;
Simon Taugourdeau
Simon Taugourdeau in OpenAIRETorbern Tagesson;
Torbern Tagesson
Torbern Tagesson in OpenAIREPaulo Salgado;
Paulo Salgado
Paulo Salgado in OpenAIREAbstract Background The savannah ecosystems of Sahel have experienced continuous and heavy grazing of livestock for centuries but still, their vegetation response to grazing pressure remains poorly understood. In this study, we analysed the herbaceous plant dynamics, measured by species diversity, composition, cover, and biomass in response to grazing pressure in the savannah ecosystems of Sahel. In Senegal, we selected four savannah sites represented with high, moderate, light and no grazing intensity levels. Transect survey methods were used for sampling the vegetation data within each of the sites. Species richness and composition were analysed using species accumulation curve and multivariate analyses. Furthermore, we used General Linear Models and a piecewise Structural Equation Model (pSEM) to examine the relationships between grazing intensity, vegetation cover, diversity and biomass. Results The herbaceous species diversity and composition varied significantly among the different grazing intensity levels (p <0.001). The plant species composition shifted from the dominance of grass cover to the dominance of forb cover with increasing grazing pressure. Moreover, the attributes of species diversity, herbaceous biomass, and ground cover were higher on sites with low grazing than sites with high and moderate grazing intensity. Across all sites, species diversity was positively related to total biomass. The pSEM explained 37% of the variance in total biomass and revealed that grazing intensity negatively influenced total biomass both directly and indirectly through its negative influence on species diversity. Conclusions Managing grazing intensity may lead to higher plant production and higher mixed forage establishment in the dryland savannah ecosystems. This information can be used to support land management strategies and promote sustainable grazing practices that balance the needs of livestock with the conservation of ecosystem health and biodiversity.
University of Freibu... arrow_drop_down University of Freiburg: FreiDokArticle . 2023Full-Text: https://freidok.uni-freiburg.de/data/254440Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2023Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2023Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1186/s13717-023-00468-3&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 6 citations 6 popularity Average influence Average impulse Top 10% Powered by BIP!
more_vert University of Freibu... arrow_drop_down University of Freiburg: FreiDokArticle . 2023Full-Text: https://freidok.uni-freiburg.de/data/254440Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2023Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2023Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1186/s13717-023-00468-3&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 Germany, Denmark, FrancePublisher:Springer Science and Business Media LLC Authors:Haftay Hailu Gebremedhn;
Haftay Hailu Gebremedhn
Haftay Hailu Gebremedhn in OpenAIREOusmane Ndiaye;
Ousmane Ndiaye
Ousmane Ndiaye in OpenAIRESylvanus Mensah;
Sylvanus Mensah
Sylvanus Mensah in OpenAIRECofélas Fassinou;
+3 AuthorsCofélas Fassinou
Cofélas Fassinou in OpenAIREHaftay Hailu Gebremedhn;
Haftay Hailu Gebremedhn
Haftay Hailu Gebremedhn in OpenAIREOusmane Ndiaye;
Ousmane Ndiaye
Ousmane Ndiaye in OpenAIRESylvanus Mensah;
Sylvanus Mensah
Sylvanus Mensah in OpenAIRECofélas Fassinou;
Cofélas Fassinou
Cofélas Fassinou in OpenAIRESimon Taugourdeau;
Simon Taugourdeau
Simon Taugourdeau in OpenAIRETorbern Tagesson;
Torbern Tagesson
Torbern Tagesson in OpenAIREPaulo Salgado;
Paulo Salgado
Paulo Salgado in OpenAIREAbstract Background The savannah ecosystems of Sahel have experienced continuous and heavy grazing of livestock for centuries but still, their vegetation response to grazing pressure remains poorly understood. In this study, we analysed the herbaceous plant dynamics, measured by species diversity, composition, cover, and biomass in response to grazing pressure in the savannah ecosystems of Sahel. In Senegal, we selected four savannah sites represented with high, moderate, light and no grazing intensity levels. Transect survey methods were used for sampling the vegetation data within each of the sites. Species richness and composition were analysed using species accumulation curve and multivariate analyses. Furthermore, we used General Linear Models and a piecewise Structural Equation Model (pSEM) to examine the relationships between grazing intensity, vegetation cover, diversity and biomass. Results The herbaceous species diversity and composition varied significantly among the different grazing intensity levels (p <0.001). The plant species composition shifted from the dominance of grass cover to the dominance of forb cover with increasing grazing pressure. Moreover, the attributes of species diversity, herbaceous biomass, and ground cover were higher on sites with low grazing than sites with high and moderate grazing intensity. Across all sites, species diversity was positively related to total biomass. The pSEM explained 37% of the variance in total biomass and revealed that grazing intensity negatively influenced total biomass both directly and indirectly through its negative influence on species diversity. Conclusions Managing grazing intensity may lead to higher plant production and higher mixed forage establishment in the dryland savannah ecosystems. This information can be used to support land management strategies and promote sustainable grazing practices that balance the needs of livestock with the conservation of ecosystem health and biodiversity.
University of Freibu... arrow_drop_down University of Freiburg: FreiDokArticle . 2023Full-Text: https://freidok.uni-freiburg.de/data/254440Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2023Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2023Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1186/s13717-023-00468-3&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 6 citations 6 popularity Average influence Average impulse Top 10% Powered by BIP!
more_vert University of Freibu... arrow_drop_down University of Freiburg: FreiDokArticle . 2023Full-Text: https://freidok.uni-freiburg.de/data/254440Data sources: Bielefeld Academic Search Engine (BASE)Copenhagen University Research Information SystemArticle . 2023Data sources: Copenhagen University Research Information SystemCIRAD: HAL (Agricultural Research for Development)Article . 2023Data sources: Bielefeld Academic Search Engine (BASE)Institut National de la Recherche Agronomique: ProdINRAArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)University of Copenhagen: ResearchArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1186/s13717-023-00468-3&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu