Pub Date : 2025-03-17DOI: 10.1016/j.biocon.2025.111042
Anna F. Cord , Kevin Darras , Ryo Ogawa , Luc Barbaro , Charlotte Gerling , Maria Kernecker , Nonka Markova-Nenova , Gabriela Rodriguez-Barrera , Felix Zichner , Frank Wätzold
Despite over three decades of agri-environmental schemes (AES) in Europe, farmland biodiversity continues to decline. Most AES are action-based, compensating farmers for implementing biodiversity-friendly management practices. In contrast, result-based payments (RBP) are AES that reward farmers for achieving specific biodiversity targets, making them a promising alternative for farmland species conservation. RBP have largely focused on vascular plants due to the difficulty and expense of monitoring elusive or mobile species. Passive Acoustic Monitoring (PAM) offers new opportunities for low-cost, standardised monitoring of soniferous animals’ occurrence, activity and diversity. This study conceptually explores the integration of PAM as a novel monitoring approach within RBP. Using established RBP design frameworks, we examine key considerations for employing PAM in future RBP. We identify appropriate biodiversity targets at species and ecological community levels as well as indicators that effectively represent these targets. We further assess how the use of PAM affects the costs associated with RBP, with a focus on expenses for monitoring. Farmer acceptance is key to the success of AES, so we discuss farmers’ willingness to adopt PAM technology and their perspectives on using ecological communities as targets in RBP. Finally, we propose pathways to implement PAM-based RBP pilot projects, emphasising collaboration with farmers and authorities, and provide an example for the whinchat as a target species. Such pilots can test the feasibility of integrating PAM in practical settings while addressing challenges identified in this study at the conceptual level, such as cost, technical implementation, and farmer engagement.
{"title":"Leveraging passive acoustic monitoring for result-based agri-environmental schemes: Opportunities, challenges and next steps","authors":"Anna F. Cord , Kevin Darras , Ryo Ogawa , Luc Barbaro , Charlotte Gerling , Maria Kernecker , Nonka Markova-Nenova , Gabriela Rodriguez-Barrera , Felix Zichner , Frank Wätzold","doi":"10.1016/j.biocon.2025.111042","DOIUrl":"10.1016/j.biocon.2025.111042","url":null,"abstract":"<div><div>Despite over three decades of agri-environmental schemes (AES) in Europe, farmland biodiversity continues to decline. Most AES are action-based, compensating farmers for implementing biodiversity-friendly management practices. In contrast, result-based payments (RBP) are AES that reward farmers for achieving specific biodiversity targets, making them a promising alternative for farmland species conservation. RBP have largely focused on vascular plants due to the difficulty and expense of monitoring elusive or mobile species. Passive Acoustic Monitoring (PAM) offers new opportunities for low-cost, standardised monitoring of soniferous animals’ occurrence, activity and diversity. This study conceptually explores the integration of PAM as a novel monitoring approach within RBP. Using established RBP design frameworks, we examine key considerations for employing PAM in future RBP. We identify appropriate biodiversity targets at species and ecological community levels as well as indicators that effectively represent these targets. We further assess how the use of PAM affects the costs associated with RBP, with a focus on expenses for monitoring. Farmer acceptance is key to the success of AES, so we discuss farmers’ willingness to adopt PAM technology and their perspectives on using ecological communities as targets in RBP. Finally, we propose pathways to implement PAM-based RBP pilot projects, emphasising collaboration with farmers and authorities, and provide an example for the whinchat as a target species. Such pilots can test the feasibility of integrating PAM in practical settings while addressing challenges identified in this study at the conceptual level, such as cost, technical implementation, and farmer engagement.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111042"},"PeriodicalIF":4.9,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-17DOI: 10.1016/j.biocon.2025.111084
Carla L. Atkinson , Irene Sánchez González , Jamie R. Bucholz , Garrett W. Hopper , Ryan C. Garrick , Colin R. Jackson , Jeffrey D. Lozier
Species richness and population genetic diversity are fundamental components of biodiversity that are both predicted to enhance ecosystem function. However, there is a lack of understanding on how biodiversity scales across levels of biological organization. Conservation initiatives differ in scope and priorities, ranging from protection of a particular species to ecosystem function such that an integrated understanding across levels may tell us how focusing on one priority may benefit others. Unionid freshwater mussels are one of the most imperiled faunal groups making them a focus of significant conservation efforts. Here we examine how genetic, species, and functional diversity are interlinked in mussels and how protection at one level may lead to greater permanence at another. We leveraged an extensive dataset from the Mobile and Tennessee River basins, a biodiversity hotspot for mussels, to test for relationships among 1) cumulative multi-species abundance, species richness, and imperilment status; 2) population genetic diversity and species abundance and richness; 3) species richness and functional diversity; and 4) genetic diversity and functional diversity. Overall, integration across these datasets revealed positive abundance-richness relationships, a positive relationship between intraspecific abundance and genetic diversity, and positive relationships for both genetic diversity and species richness with functional richness. Our results have implications for species- or ecosystem-level conservation and management efforts as managers may be able to survey diversity at a subset of levels and make reasonable predictions about the others. Despite the dire prognosis for freshwater biodiversity, we show there are opportunities for bridging basic research and conservation actions.
{"title":"Integration of genetic, taxonomic, and functional dimensions of biodiversity yields conservation insights","authors":"Carla L. Atkinson , Irene Sánchez González , Jamie R. Bucholz , Garrett W. Hopper , Ryan C. Garrick , Colin R. Jackson , Jeffrey D. Lozier","doi":"10.1016/j.biocon.2025.111084","DOIUrl":"10.1016/j.biocon.2025.111084","url":null,"abstract":"<div><div>Species richness and population genetic diversity are fundamental components of biodiversity that are both predicted to enhance ecosystem function. However, there is a lack of understanding on how biodiversity scales across levels of biological organization. Conservation initiatives differ in scope and priorities, ranging from protection of a particular species to ecosystem function such that an integrated understanding across levels may tell us how focusing on one priority may benefit others. Unionid freshwater mussels are one of the most imperiled faunal groups making them a focus of significant conservation efforts. Here we examine how genetic, species, and functional diversity are interlinked in mussels and how protection at one level may lead to greater permanence at another. We leveraged an extensive dataset from the Mobile and Tennessee River basins, a biodiversity hotspot for mussels, to test for relationships among 1) cumulative multi-species abundance, species richness, and imperilment status; 2) population genetic diversity and species abundance and richness; 3) species richness and functional diversity; and 4) genetic diversity and functional diversity. Overall, integration across these datasets revealed positive abundance-richness relationships, a positive relationship between intraspecific abundance and genetic diversity, and positive relationships for both genetic diversity and species richness with functional richness. Our results have implications for species- or ecosystem-level conservation and management efforts as managers may be able to survey diversity at a subset of levels and make reasonable predictions about the others. Despite the dire prognosis for freshwater biodiversity, we show there are opportunities for bridging basic research and conservation actions.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111084"},"PeriodicalIF":4.9,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-16DOI: 10.1016/j.biocon.2025.111058
Soumaya Belghali , Pierrick Devoucoux , Daniel Bizet , Nathalie Hiessler , Thomas Menut , Olivier Scher , Vincent Bretagnolle , Aurélien Besnard
Artificialization has significantly increased in the past century, posing one of the greatest threats to the viability of animal populations. Since 1980, it has been the second-highest cause of decline in farmland bird populations in Western Europe, after agricultural intensification. Impacts occur through direct destruction of natural and semi-natural habitats or their fragmentation, and also indirectly through the alteration of abiotic and biotic conditions in surrounding habitats, a phenomenon known as the zone effect. Most studies on the effect of artificialization on birds focus on existing structures without considering pre-construction conditions, which limits the ability to accurately assess and quantify their impacts and their zone effect. These studies also often only focus on singing male birds, which are easier to monitor, although females tend to make a greater contribution to population dynamics and may behave differently than males. Taking a different approach, this study estimated the impact of linear transport infrastructure before, during and after its construction on female birds in a breeding population. The case study was the Nîmes–Montpellier high-speed railway (HSR), which crosses the Costières Nîmoises Special Protection Area, home to one of the largest populations in France of little bustards (Tetrax tetrax), a highly endangered farmland bird species. Over a 10-year period, female little bustards were monitored before, during and after construction of the HSR within suitable breeding habitat at stratified distances from the railway. The results revealed a significant decline in female density, with a strong avoidance of areas near the HSR, extending up to 775 m after the trains began operating. While there were no major changes in breeding habitat availability in the area, female breeding capacity dropped by 57.8 % in the zone effect area, representing 26 % of the protected area. These findings highlight the need for thorough assessments of the indirect impacts of infrastructure using robust before-during-after-distance-control-impact methods. They also show the importance of considering zone effects in environmental impact assessments and conservation planning to ensure effective protection of threatened species.
{"title":"Assessing the impact of transport infrastructure construction on breeding birds: A long term before-during-after experiment on female bustards","authors":"Soumaya Belghali , Pierrick Devoucoux , Daniel Bizet , Nathalie Hiessler , Thomas Menut , Olivier Scher , Vincent Bretagnolle , Aurélien Besnard","doi":"10.1016/j.biocon.2025.111058","DOIUrl":"10.1016/j.biocon.2025.111058","url":null,"abstract":"<div><div>Artificialization has significantly increased in the past century, posing one of the greatest threats to the viability of animal populations. Since 1980, it has been the second-highest cause of decline in farmland bird populations in Western Europe, after agricultural intensification. Impacts occur through direct destruction of natural and semi-natural habitats or their fragmentation, and also indirectly through the alteration of abiotic and biotic conditions in surrounding habitats, a phenomenon known as the zone effect. Most studies on the effect of artificialization on birds focus on existing structures without considering pre-construction conditions, which limits the ability to accurately assess and quantify their impacts and their zone effect. These studies also often only focus on singing male birds, which are easier to monitor, although females tend to make a greater contribution to population dynamics and may behave differently than males. Taking a different approach, this study estimated the impact of linear transport infrastructure before, during and after its construction on female birds in a breeding population. The case study was the Nîmes–Montpellier high-speed railway (HSR), which crosses the Costières Nîmoises Special Protection Area, home to one of the largest populations in France of little bustards (<em>Tetrax tetrax</em>), a highly endangered farmland bird species. Over a 10-year period, female little bustards were monitored before, during and after construction of the HSR within suitable breeding habitat at stratified distances from the railway. The results revealed a significant decline in female density, with a strong avoidance of areas near the HSR, extending up to 775 m after the trains began operating. While there were no major changes in breeding habitat availability in the area, female breeding capacity dropped by 57.8 % in the zone effect area, representing 26 % of the protected area. These findings highlight the need for thorough assessments of the indirect impacts of infrastructure using robust before-during-after-distance-control-impact methods. They also show the importance of considering zone effects in environmental impact assessments and conservation planning to ensure effective protection of threatened species.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111058"},"PeriodicalIF":4.9,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-15DOI: 10.1016/j.biocon.2025.111036
David C. Bañuelas, Samantha A. Bellier-Igasaki, Doreen J. Guzman, Arlena Esquivel, Ngoc H.D. Le, Doan M. Nguyen, Celeste A. Franco, Jessica R. Giampietro, Kathleen K. Treseder
Globally, old-growth forests are a critical benchmark for restoring second-growth. In Northern California, the Redwood National and State Parks protects nearly 50 % of the remaining old-growth range of coast redwoods (Sequoia sempervirens). There, Pinaceae trees were aerially seeded in second-growth stands. While the deleterious effects of this approach in redwoods are well documented, the effects on mycorrhizal fungi have yet to be considered. This study aimed to determine how arbuscular mycorrhizal fungi (AMF) and ectomycorrhizal fungi (EMF) are affected by the encroachment and subsequent thinning of Pinaceae. We expected the exclusive reliance of Sitka spruce (Picea sitchensis) and Douglas-fir (Pseudotsuga menziesii) on EMF to reduce the richness and relative abundance of AMF in second-growth stands compared to old-growth. Indeed, we found this to be the case (P < 0.05; Kruskal-Wallis). While we predicted the richness and relative abundance of EMF to be most prevalent in second-growth, there were no significant differences between old- and second-growth stands. Furthermore, we expected the soils of thinned forests to be intermediate, where the richness and relative abundance of AMF and EMF would fall between old- and second-growth. Instead, the richness and relative abundance of AMF in thinned forests was significantly lower compared to old-growth, and closer to that of unthinned second-growth stands. We only found marginal differences in the composition of the broader fungal community across old-growth, second-growth, and thinned redwood stands. Future efforts should aim to restore AMF in second-growth and thinned forests to resemble below-ground conditions of old-growth.
{"title":"Old growth forests: A blueprint for restoring mycorrhizal fungi in second-growth and thinned coast redwood (Sequoia sempervirens) stands","authors":"David C. Bañuelas, Samantha A. Bellier-Igasaki, Doreen J. Guzman, Arlena Esquivel, Ngoc H.D. Le, Doan M. Nguyen, Celeste A. Franco, Jessica R. Giampietro, Kathleen K. Treseder","doi":"10.1016/j.biocon.2025.111036","DOIUrl":"10.1016/j.biocon.2025.111036","url":null,"abstract":"<div><div>Globally, old-growth forests are a critical benchmark for restoring second-growth. In Northern California, the Redwood National and State Parks protects nearly 50 % of the remaining old-growth range of coast redwoods (<em>Sequoia sempervirens</em>). There, Pinaceae trees were aerially seeded in second-growth stands. While the deleterious effects of this approach in redwoods are well documented, the effects on mycorrhizal fungi have yet to be considered. This study aimed to determine how arbuscular mycorrhizal fungi (AMF) and ectomycorrhizal fungi (EMF) are affected by the encroachment and subsequent thinning of Pinaceae. We expected the exclusive reliance of Sitka spruce (<em>Picea sitchensis</em>) and Douglas-fir (<em>Pseudotsuga menziesii</em>) on EMF to reduce the richness and relative abundance of AMF in second-growth stands compared to old-growth. Indeed, we found this to be the case (<em>P</em> < 0.05; Kruskal-Wallis). While we predicted the richness and relative abundance of EMF to be most prevalent in second-growth, there were no significant differences between old- and second-growth stands. Furthermore, we expected the soils of thinned forests to be intermediate, where the richness and relative abundance of AMF and EMF would fall between old- and second-growth. Instead, the richness and relative abundance of AMF in thinned forests was significantly lower compared to old-growth, and closer to that of unthinned second-growth stands. We only found marginal differences in the composition of the broader fungal community across old-growth, second-growth, and thinned redwood stands. Future efforts should aim to restore AMF in second-growth and thinned forests to resemble below-ground conditions of old-growth.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111036"},"PeriodicalIF":4.9,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-15DOI: 10.1016/j.biocon.2025.111095
Isadora Amaral-Silva , Gabriel Prado Barcelos , Matheus Ganiko-Dutra , Veridiana de Lara Weiser
In many countries, Environment Impact Assessment fails in addressing biodiversity. The current legal framework in Brazil restricts the recognition of fungi, leading to gaps in environmental assessments and conservation efforts. This perspective article explores the implications of this legal omission and offers proposals for the inclusion of fungi in Environmental Impact Reports (EIRs) and other relevant conservation documents. The article discusses the importance of fungi in ecosystem sustainability and biodiversity, presenting specific inclusion measures such as fostering specialized mycological groups, implementing mitigation strategies like fungarium creation and fungal rescue programs, and enhancing mycological research. Furthermore, it emphasizes the need for robust public policy support and the integration of fungi in national conservation strategies. The article highlights the urgency of training qualified professionals to effectively incorporate fungi into environmental assessments, ultimately advocating for a more comprehensive and inclusive approach to biodiversity conservation in Brazil, contributing to a global debate about biodiversity in Environment Impact Assessment.
{"title":"Including Funga in Brazilian environmental impact reports","authors":"Isadora Amaral-Silva , Gabriel Prado Barcelos , Matheus Ganiko-Dutra , Veridiana de Lara Weiser","doi":"10.1016/j.biocon.2025.111095","DOIUrl":"10.1016/j.biocon.2025.111095","url":null,"abstract":"<div><div>In many countries, Environment Impact Assessment fails in addressing biodiversity. The current legal framework in Brazil restricts the recognition of fungi, leading to gaps in environmental assessments and conservation efforts. This perspective article explores the implications of this legal omission and offers proposals for the inclusion of fungi in Environmental Impact Reports (EIRs) and other relevant conservation documents. The article discusses the importance of fungi in ecosystem sustainability and biodiversity, presenting specific inclusion measures such as fostering specialized mycological groups, implementing mitigation strategies like fungarium creation and fungal rescue programs, and enhancing mycological research. Furthermore, it emphasizes the need for robust public policy support and the integration of fungi in national conservation strategies. The article highlights the urgency of training qualified professionals to effectively incorporate fungi into environmental assessments, ultimately advocating for a more comprehensive and inclusive approach to biodiversity conservation in Brazil, contributing to a global debate about biodiversity in Environment Impact Assessment.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111095"},"PeriodicalIF":4.9,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-14DOI: 10.1016/j.biocon.2025.111091
Catherine J. Price, Annabel Ellis, Peter B. Banks
Some individuals within a predator population inflict disproportionate impacts on prey. Managing this ‘rogue’ behaviour is crucial when prey is of conservation concern, but challenging when its prevalence is unknown. We ran a multi-stage experiment to discover the prevalence of ‘rogue’ predatory behaviour within an invasive black rat Rattus rattus population and if exposure to unrewarding prey odour inhibited interest in prey. First, marked rats were exposed to quail eggs to identify ‘rogues’ (individuals that ate eggs on multiple nights). We then tested if rats remained motivated to hunt eggs after approximately 14 days exposure to an unrewarding bird odour. From 85 marked rats, 19 were ‘rogues’ and showed no demographic differences to the rest of the population. However, ‘rogues’ visited the unrewarded odour for more nights and were more likely to hunt eggs after exposure to prey odour. Our results suggest that ‘rogues’ are behaviourally, not demographically, different. Problematic behaviour is likely facilitated by reinforcement and experience. Their interest in unrewarding prey odours suggests ‘rogues’ are highly motivated and attentive to prey cues. Complex spatial and temporal exposure to unrewarded cues (misinformation) may deter interest in prey by ‘rogues’ but remains to be tested.
{"title":"Understanding rogue behaviour provides insight for limiting damage by a global bird predator","authors":"Catherine J. Price, Annabel Ellis, Peter B. Banks","doi":"10.1016/j.biocon.2025.111091","DOIUrl":"10.1016/j.biocon.2025.111091","url":null,"abstract":"<div><div>Some individuals within a predator population inflict disproportionate impacts on prey. Managing this ‘rogue’ behaviour is crucial when prey is of conservation concern, but challenging when its prevalence is unknown. We ran a multi-stage experiment to discover the prevalence of ‘rogue’ predatory behaviour within an invasive black rat <em>Rattus rattus</em> population and if exposure to unrewarding prey odour inhibited interest in prey. First, marked rats were exposed to quail eggs to identify ‘rogues’ (individuals that ate eggs on multiple nights). We then tested if rats remained motivated to hunt eggs after approximately 14 days exposure to an unrewarding bird odour. From 85 marked rats, 19 were ‘rogues’ and showed no demographic differences to the rest of the population. However, ‘rogues’ visited the unrewarded odour for more nights and were more likely to hunt eggs after exposure to prey odour. Our results suggest that ‘rogues’ are behaviourally, not demographically, different. Problematic behaviour is likely facilitated by reinforcement and experience. Their interest in unrewarding prey odours suggests ‘rogues’ are highly motivated and attentive to prey cues. Complex spatial and temporal exposure to unrewarded cues (misinformation) may deter interest in prey by ‘rogues’ but remains to be tested.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111091"},"PeriodicalIF":4.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-14DOI: 10.1016/j.biocon.2025.111087
João Paulo S. Vieira-Alencar , Ana Paula Carmignotto , Ricardo J. Sawaya , Luís Fábio Silveira , Paula Hanna Valdujo , Cristiano de Campos Nogueira
The Cerrado is the second-largest Neotropical ecoregion and the richest and most threatened savanna globally. It is recognized as a biodiversity hotspot due to its high number of endemic species and significant rates of habitat loss. Here, we synthesise recent advances in taxonomic and biogeographic knowledge of endemic terrestrial vertebrates (tetrapods) in the Cerrado, with an update on current levels of threat, habitat loss and protection for these endemic biotas. Over the past two decades, new tetrapods have been described throughout the Cerrado at an average rate of six species per year, with recently discovered species exhibiting restricted ranges. Most new species were described from regions already highly impacted by human activities, and almost half of all endemic tetrapod species showed <50 % of their range covered by natural habitats. Moreover, >87 % of species have <17 % of their ranges within protected areas, indicating substantial protection gaps in the Cerrado. Our findings suggest that the number of threatened species in the Cerrado is likely underestimated, with many data-deficient species impacted by recent habitat loss and lacking adequate protection. Previous assessments of Cerrado biodiversity have underestimated endemism levels, and the newly discovered endemic tetrapods are poorly represented in red lists and conservation actions. Urgent conservation measures are needed to prevent biodiversity loss in this highly endemic and most threatened savanna in the world.
{"title":"Hotspot getting hotter: Increased knowledge on tetrapod endemism, habitat loss and the plight of the most threatened savanna in the world","authors":"João Paulo S. Vieira-Alencar , Ana Paula Carmignotto , Ricardo J. Sawaya , Luís Fábio Silveira , Paula Hanna Valdujo , Cristiano de Campos Nogueira","doi":"10.1016/j.biocon.2025.111087","DOIUrl":"10.1016/j.biocon.2025.111087","url":null,"abstract":"<div><div>The Cerrado is the second-largest Neotropical ecoregion and the richest and most threatened savanna globally. It is recognized as a biodiversity hotspot due to its high number of endemic species and significant rates of habitat loss. Here, we synthesise recent advances in taxonomic and biogeographic knowledge of endemic terrestrial vertebrates (tetrapods) in the Cerrado, with an update on current levels of threat, habitat loss and protection for these endemic biotas. Over the past two decades, new tetrapods have been described throughout the Cerrado at an average rate of six species per year, with recently discovered species exhibiting restricted ranges. Most new species were described from regions already highly impacted by human activities, and almost half of all endemic tetrapod species showed <50 % of their range covered by natural habitats. Moreover, >87 % of species have <17 % of their ranges within protected areas, indicating substantial protection gaps in the Cerrado. Our findings suggest that the number of threatened species in the Cerrado is likely underestimated, with many data-deficient species impacted by recent habitat loss and lacking adequate protection. Previous assessments of Cerrado biodiversity have underestimated endemism levels, and the newly discovered endemic tetrapods are poorly represented in red lists and conservation actions. Urgent conservation measures are needed to prevent biodiversity loss in this highly endemic and most threatened savanna in the world.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111087"},"PeriodicalIF":4.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-14DOI: 10.1016/j.biocon.2025.111088
Bess Bookout, Sarah Herzog, Zak Ratajczak
The simultaneous agricultural conversion of North American prairies and removal of native megagrazers—primarily bison (Bison bison)—has limited our understanding of how bison impact prairie plant communities. Further obscuring the role of native megagrazers is that, in what little prairie remains, either grazers are absent or domestic cattle are dominant. We used a three-decade experiment to assess how fire frequency and reintroducing bison affected upland tallgrass prairie plant communities and their phylogenetic diversity (PD). Grazing and fire shifted plant communities significantly over time. The ungrazed treatment was a largely static community dominated by four grass species, with occasional forbs and subshrubs. In contrast, community composition in the bison treatment shifted dramatically, with increasing abundance of native forbs, subdominant grasses, and small annual plant species. Compared to ungrazed areas, bison treatments had 225 % more unique species, 125 % more unique plant families, and higher richness within common plant families such as Asteraceae, Fabaceae, and Poaceae. Cattle-grazed communities fell between these two treatments with higher abundance and richness of Carex spp. Most treatments had similar, unchanging PD values over time, except annually burned, ungrazed prairie, where PD steadily declined. All treatments were resistant and/or resilient to an extreme drought in 2011 and 2012, with no lasting changes in composition or PD before, during or after the drought. This resistance to change emphasizes the importance of the core grassland plant species to maintain functional group composition. Grazing and fire drove shifts in tallgrass prairie plant communities, which were resilient to extreme drought.
{"title":"Resilience and multi-faceted diversity of grazed and ungrazed great plains grassland plant communities to severe drought","authors":"Bess Bookout, Sarah Herzog, Zak Ratajczak","doi":"10.1016/j.biocon.2025.111088","DOIUrl":"10.1016/j.biocon.2025.111088","url":null,"abstract":"<div><div>The simultaneous agricultural conversion of North American prairies and removal of native megagrazers—primarily bison (<em>Bison bison</em>)—has limited our understanding of how bison impact prairie plant communities. Further obscuring the role of native megagrazers is that, in what little prairie remains, either grazers are absent or domestic cattle are dominant. We used a three-decade experiment to assess how fire frequency and reintroducing bison affected upland tallgrass prairie plant communities and their phylogenetic diversity (PD). Grazing and fire shifted plant communities significantly over time. The ungrazed treatment was a largely static community dominated by four grass species, with occasional forbs and subshrubs. In contrast, community composition in the bison treatment shifted dramatically, with increasing abundance of native forbs, subdominant grasses, and small annual plant species. Compared to ungrazed areas, bison treatments had 225 % more unique species, 125 % more unique plant families, and higher richness within common plant families such as Asteraceae, Fabaceae, and Poaceae<em>.</em> Cattle-grazed communities fell between these two treatments with higher abundance and richness of <em>Carex</em> spp. Most treatments had similar, unchanging PD values over time, except annually burned, ungrazed prairie, where PD steadily declined. All treatments were resistant and/or resilient to an extreme drought in 2011 and 2012, with no lasting changes in composition or PD before, during or after the drought. This resistance to change emphasizes the importance of the core grassland plant species to maintain functional group composition. Grazing and fire drove shifts in tallgrass prairie plant communities, which were resilient to extreme drought.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111088"},"PeriodicalIF":4.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-13DOI: 10.1016/j.biocon.2025.111041
Marine Robuchon , Camille Bernery , Ana Cristina Cardoso , Cheikh A.K.M. Dia , Franck Courchamp , Christophe Diagne , Eugenio Gervasini , Gustavo Heringer , Sandrine Pavoine , David Renault , Vanessa Rezende , Anne-Charlotte Vaissière , Céline Bellard
Several studies have revealed species that constitute conservation paradoxes because they are invasive in some areas and threatened in others. However, those studies only considered ecological impacts of invasions and species' threat category as a criterion that makes them conservation priorities. Here, our aim was to highlight further species that cause economic costs because of their invasiveness in some areas while being in need of priority protection in their native ranges. We used the InvaCost database to calculate an economic cost for each invasive alien species (IAS) in this database and explored the threat category, as well as the phylogenetic and functional distinctiveness of these IAS. We also focused on the costliest IAS to reveal their threat category and distinctiveness. Among the 355 species of mammals, birds, and plants constituting IAS with sufficient data on economic costs, we found that 10 species are also conservation priorities because they are threatened in their native range, therefore constituting conservation paradoxes. We further found that 27 IAS with economic costs are also conservation priorities because they are among the most phylogenetically or functionally distinctive, thus constituting conservation challenges. One IAS with economic costs is a conservation priority both because it is threatened in its native range and phylogenetically distinctive: the koala. Finally, we found three conservation paradoxes or challenges among the costliest IAS. Our work stresses to an unprecedented level that some species simultaneously need to be controlled in their invasive range and protected in their native range.
{"title":"Conservation paradoxes and challenges in invasive alien species with economic costs","authors":"Marine Robuchon , Camille Bernery , Ana Cristina Cardoso , Cheikh A.K.M. Dia , Franck Courchamp , Christophe Diagne , Eugenio Gervasini , Gustavo Heringer , Sandrine Pavoine , David Renault , Vanessa Rezende , Anne-Charlotte Vaissière , Céline Bellard","doi":"10.1016/j.biocon.2025.111041","DOIUrl":"10.1016/j.biocon.2025.111041","url":null,"abstract":"<div><div>Several studies have revealed species that constitute conservation paradoxes because they are invasive in some areas and threatened in others. However, those studies only considered ecological impacts of invasions and species' threat category as a criterion that makes them conservation priorities. Here, our aim was to highlight further species that cause economic costs because of their invasiveness in some areas while being in need of priority protection in their native ranges. We used the InvaCost database to calculate an economic cost for each invasive alien species (IAS) in this database and explored the threat category, as well as the phylogenetic and functional distinctiveness of these IAS. We also focused on the costliest IAS to reveal their threat category and distinctiveness. Among the 355 species of mammals, birds, and plants constituting IAS with sufficient data on economic costs, we found that 10 species are also conservation priorities because they are threatened in their native range, therefore constituting conservation paradoxes. We further found that 27 IAS with economic costs are also conservation priorities because they are among the most phylogenetically or functionally distinctive, thus constituting conservation challenges. One IAS with economic costs is a conservation priority both because it is threatened in its native range and phylogenetically distinctive: the koala. Finally, we found three conservation paradoxes or challenges among the costliest IAS. Our work stresses to an unprecedented level that some species simultaneously need to be controlled in their invasive range and protected in their native range.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111041"},"PeriodicalIF":4.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-12DOI: 10.1016/j.biocon.2025.111089
Alexandra Galão , Elena J. Soto , João Nunes , Nuno M. Pedroso , Ricardo Rocha , Catarina Rato
Oceanic island ecosystems are particularly vulnerable to the impacts of introduced mammalian predators. Among these, free-ranging cats (Felis catus) are especially detrimental, and have been linked to the extinction and population decline of numerous insular taxa. Yet, a more holistic understanding of the impacts of free-ranging cats has been hampered by an incomplete understanding of their diet and population densities. Using a peri-urban protected area in the subtropical Madeira Island as a case study, we combined DNA metabarcoding, morphological scat analyses, and camera trapping to investigate the magnitude of native and introduced prey consumption by cats. Based on 58 scats collected over the summer and autumn of 2021, we found that cats consume over 20 distinct taxa from ten orders, including native and non-native prey, as well as taxa associated with anthropogenic food. Cat diet was seasonally modulated, with a higher incidence of reptiles in the summer months. Although DNA metabarcoding revealed a higher diversity of prey taxa compared to traditional morphological scat analyses, both methods provided complementary insights, highlighting the benefits of their combined use. Combining our diet results with a free-ranging cat density of 1.4 cats/km2, as revealed by the protected area-wide camera trap survey, we estimate an annual prey intake of over 18,000 vertebrates by cats in a protected area of 7.5 km2, of which over one-third corresponds to native birds and reptiles. These findings underscore the complex interactions between cats and native wildlife, emphasising the need for targeted conservation strategies in ecologically sensitive areas.
{"title":"When pets go wild: Integrating DNA metabarcoding and morphological analyses to investigate the impacts of free-ranging cats (Felis catus) on oceanic islands","authors":"Alexandra Galão , Elena J. Soto , João Nunes , Nuno M. Pedroso , Ricardo Rocha , Catarina Rato","doi":"10.1016/j.biocon.2025.111089","DOIUrl":"10.1016/j.biocon.2025.111089","url":null,"abstract":"<div><div>Oceanic island ecosystems are particularly vulnerable to the impacts of introduced mammalian predators. Among these, free-ranging cats (<em>Felis catus</em>) are especially detrimental, and have been linked to the extinction and population decline of numerous insular taxa. Yet, a more holistic understanding of the impacts of free-ranging cats has been hampered by an incomplete understanding of their diet and population densities. Using a peri-urban protected area in the subtropical Madeira Island as a case study, we combined DNA metabarcoding, morphological scat analyses, and camera trapping to investigate the magnitude of native and introduced prey consumption by cats. Based on 58 scats collected over the summer and autumn of 2021, we found that cats consume over 20 distinct taxa from ten orders, including native and non-native prey, as well as taxa associated with anthropogenic food. Cat diet was seasonally modulated, with a higher incidence of reptiles in the summer months. Although DNA metabarcoding revealed a higher diversity of prey taxa compared to traditional morphological scat analyses, both methods provided complementary insights, highlighting the benefits of their combined use. Combining our diet results with a free-ranging cat density of 1.4 cats/km<sup>2</sup>, as revealed by the protected area-wide camera trap survey, we estimate an annual prey intake of over 18,000 vertebrates by cats in a protected area of 7.5 km<sup>2</sup>, of which over one-third corresponds to native birds and reptiles. These findings underscore the complex interactions between cats and native wildlife, emphasising the need for targeted conservation strategies in ecologically sensitive areas.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"305 ","pages":"Article 111089"},"PeriodicalIF":4.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}