African Journal of Ecology最新文献_第10页

Functional diversity of avian communities in response to habitat fragmentation in human-dominated landscapes of Tanzania miombo woodlands 在坦桑尼亚以人类为主的混交林地中，鸟类群落的功能多样性对生境破碎化的反应

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-06-17 DOI: 10.1111/aje.13293

David J. Kavana, Nsajigwa Mbije, Teclamageni S. Mayeji, Bing Yu

{"title":"Functional diversity of avian communities in response to habitat fragmentation in human-dominated landscapes of Tanzania miombo woodlands","authors":"David J. Kavana, Nsajigwa Mbije, Teclamageni S. Mayeji, Bing Yu","doi":"10.1111/aje.13293","DOIUrl":"https://doi.org/10.1111/aje.13293","url":null,"abstract":"Biodiversity conservation in human-inhabited landscapes is increasingly gaining attention due to the global decline of species. Understanding the impact of human activities on avian functional ecology is becoming increasingly important as habitats are transformed. We assessed the influence of habitat fragmentation on avian functional diversity (FD), focusing on metrics like functional richness (FRic), evenness (FEve) and divergence (FDiv). We calculated the FRic, FEve and FDiv across habitats using ‘fundiversity’ R package. We also calculated the Enhanced Vegetation Index (EVI) and estimated land-use cover of the study area from Landsat 8 images. We observed higher FD in minimally disturbed habitats, where among the habitats, woodland had high FD while human settlement had low. This supports the intermediate disturbance hypothesis, which suggests that moderate disturbance can increase species diversity. Our findings emphasise the pivotal role of fragmented habitats in shaping avian functional ecology, with environmental variables such as the EVI influencing diversity across habitats. Hence, we promote sustainable conservation connectivity, proper land management practices and conservation-friendly agricultural practices for sustainable biodiversity conservation.","PeriodicalId":7844,"journal":{"name":"African Journal of Ecology","volume":"62 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141424987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Leopard dispersal across a fragmented landscape in the Western Cape, South Africa 豹在南非西开普省破碎景观中的散布情况

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-06-17 DOI: 10.1111/aje.13284

Anita Wilkinson, Michael Fabricius, Erica Brink, Rebecca Garbett, Eugene Hahndiek, Kathryn S. Williams

引用次数: 0

Three decades of land use and land cover changes in an East African lake and their implications for the conservation of bird communities 东非一个湖泊三十年的土地利用和土地覆盖变化及其对鸟类群落保护的影响

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-06-10 DOI: 10.1111/aje.13282

Yismaw Alemayehu, Gashaw Molla, Monika Sadananda

{"title":"Three decades of land use and land cover changes in an East African lake and their implications for the conservation of bird communities","authors":"Yismaw Alemayehu, Gashaw Molla, Monika Sadananda","doi":"10.1111/aje.13282","DOIUrl":"https://doi.org/10.1111/aje.13282","url":null,"abstract":"Land use and land cover (LULC) dynamics using GIS and remote sensing techniques measure extent and spatial structure, which are critical for monitoring biomes. A digital LULC detection technique with multi-temporal satellite imagery analysis was employed at four timepoints from 1987 to 2017 and performed using supervised classifications method in ERDAS imagine 2015. For image classification, the five major LULC types included forests, built-up land, agricultural land, water bodies and grasslands. LULC of grasslands, forests and water bodies reduced, while LULC of agricultural and built-up lands increased. Avifaunal surveys were conducted at 11 sites across the LULC classes to compare species richness and abundance. The decrement of forests and water bodies would result in habitat loss, affecting endemic and threatened avifauna, as forests showed highest avifaunal species diversity (H′ = 3.80). Despite the decrement, grasslands demonstrated higher avifaunal species richness (107) and abundance (2767). Species richness decreased significantly from grasslands to water bodies and agricultural land (p < 0.05), and from forests to agricultural and built-up land (p < 0.05), and water bodies (p < 0.01). Avifaunal abundance decreased significantly from grasslands to all other LULC classes. Regular LULC change assessment is integral to avifaunal habitat and biodiversity conservation efforts, particularly at Lake Tana.","PeriodicalId":7844,"journal":{"name":"African Journal of Ecology","volume":"62 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141304276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Passive acoustic monitoring of endangered endemic Afromontane tropical species: A case study with two turacos 对濒临灭绝的非洲特有热带物种进行被动声学监测：两只图拉科鸟的案例研究

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-06-10 DOI: 10.1111/aje.13280

Dominika Winiarska, Cristian Pérez-Granados, Michał Budka, Tomasz S. Osiejuk

{"title":"Passive acoustic monitoring of endangered endemic Afromontane tropical species: A case study with two turacos","authors":"Dominika Winiarska, Cristian Pérez-Granados, Michał Budka, Tomasz S. Osiejuk","doi":"10.1111/aje.13280","DOIUrl":"https://doi.org/10.1111/aje.13280","url":null,"abstract":"Passive acoustic monitoring (PAM) is a reliable method for studying the behaviour and ecology of vocally active animals, providing insights into species' activity patterns. Here, we utilised a year-long recording programme conducted in six areas of the Afromontane tropical forest of Cameroon to assess the utility of PAM, describe the annual and circadian vocal activity patterns, and assess the relationship between vocal activity and climate conditions for two African turaco species: the endemic and Endangered Bannerman's turaco (Tauraco bannermani) and the common, but locally at risk, Great blue turaco (Corythaeola cristata). The automated software detected 8670 vocalisations of Bannerman's turaco and 374 of the Great blue turaco, proving the ability of passive acoustics, coupled with automated software, for monitoring these species. Our findings suggest that both turacos are sedentary and seasonal breeders, exhibiting larger peaks of vocal activity during the dry season, although both species showed smaller activity peaks during the wet season. Similar circadian patterns were observed for both species, with activity peaks occurring at dawn and dusk. Long-term monitoring programmes of both species should be implemented in the study areas, especially regarding the Great blue turaco, which may soon disappear from Bamenda Highlands.","PeriodicalId":7844,"journal":{"name":"African Journal of Ecology","volume":"62 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141304274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Artificial water point use by large African mammals in a small enclosed savannah-woodland reserve: Insights from an 8-year study 非洲大型哺乳动物在一个小型封闭的草原-林地保护区内使用人工取水点的情况：8 年研究的启示

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-06-10 DOI: 10.1111/aje.13281

Willem A. Nieman, Alison J. Leslie

{"title":"Artificial water point use by large African mammals in a small enclosed savannah-woodland reserve: Insights from an 8-year study","authors":"Willem A. Nieman, Alison J. Leslie","doi":"10.1111/aje.13281","DOIUrl":"https://doi.org/10.1111/aje.13281","url":null,"abstract":"Maintaining water availability is crucial for sustaining wildlife populations in African savannah ecosystems, especially in semi-arid regions where natural surface water sources are limited. The establishment of Artificial Water Points (AWPs) has become a common management strategy in protected areas to mitigate the effects of water scarcity. This study investigated the spatio-temporal patterns of mammal visitation to AWPs in Majete Wildlife Reserve, Malawi, over an eight-year period using motion-triggered camera traps. The study documented a total of 34 medium- to large-sized mammal species, with warthog, waterbuck, impala and yellow baboon being the most frequently captured. Temporal analysis reveals diurnal visitation patterns, with peak activity during mid-day hours, and seasonal variations, with most species exhibiting increased visitation during the hot-dry season. Spatial analysis identifies preferences for AWPs proximate to perennial rivers and tourist infrastructure, emphasising the role of habitat features and human presence in AWP utilisation. Management implications include the need for tailored strategies addressing species-specific behaviours and habitat conditions, alongside ongoing monitoring efforts to ensure the sustainability of wildlife populations and ecological integrity. Despite the inherent limitations of camera trap methodology, this study provides valuable insights into AWP management strategies essential for conserving biodiversity in semi-arid environments.","PeriodicalId":7844,"journal":{"name":"African Journal of Ecology","volume":"62 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141304275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Diversity, habitat and activity patterns of mesocarnivore assemblages in an Afrotropical protected forest savannah mosaic of Central Cameroon 喀麦隆中部非洲热带保护林稀树草原中食肉动物群落的多样性、栖息地和活动模式

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-06-10 DOI: 10.1111/aje.13283

Ernest D. B. Fotsing, Meigang M. F. Kamkeng, Salah Marcel Senge, Dietmar Zinner

{"title":"Diversity, habitat and activity patterns of mesocarnivore assemblages in an Afrotropical protected forest savannah mosaic of Central Cameroon","authors":"Ernest D. B. Fotsing, Meigang M. F. Kamkeng, Salah Marcel Senge, Dietmar Zinner","doi":"10.1111/aje.13283","DOIUrl":"https://doi.org/10.1111/aje.13283","url":null,"abstract":"Little is known about the diversity and ecology of mesocarnivores in the Mpem and Djim National Parks in central Cameroon. Therefore, we undertook a rapid assessment using camera traps from September 2021 to December 2021. The main objective of our study was to collect data on the diversity, abundance and relative frequency of mesocarnivores per habitat type and their activity period using camera traps with a distance sampling method. In 1700 trap nights, we recorded 53 events of seven mesocarnivores, all belonging to the family of Viveridae, Herpesdidae and Felidae which yield 3.12 mesocarnivores per 100 days. The black-legged mongoose (Bdeogale nigripes, Pucheran, 1855) exhibited the highest capture rate (CR, 0.88). The long-nosed mongoose (Xenogale naso, Winton, 1901) was found in all habitats class and was the more active mesocarnivore. The Shannon-Weaver diversity index (H) showed a high diversity of species in the community with high diversity in the near primary forest. We obtained a lower dominance of one species over the other, a lower richness and a more even distribution of species between habitats. Our results suggest a possible spatio-temporal niche partitioning between the species recorded, with blotched genet (Genetta maculata, Gray, 1830), showing no clear peak of activity. However, the rarefaction curve indicates that the effort expended was insufficient, suggesting that additional sampling is required to obtain a reasonable estimate of species richness within our community. The activity patterns of the recorded mesocarnivores were generally similar to those reported elsewhere but suggest some behavioural flexibility. Although all these species are listed as Least Concern by the IUCN, the low number of recorded events may indicate that mesocarnivores may be threatened in this area if effective conservation strategies are not implemented.","PeriodicalId":7844,"journal":{"name":"African Journal of Ecology","volume":"62 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aje.13283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141304277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Understanding fire intensity in the Sudanian savannah of Western Africa: Implications for sustainable fire management 了解西非苏丹大草原的火灾强度：对可持续火灾管理的影响

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-05-17 DOI: 10.1111/aje.13278

Omobayo Ghislain Zoffoun, Chabi A. M. S. Djagoun, Thanh Thi Nguyen, Brice Sinsin, Etotépé A. Sogbohossou

引用次数: 0

Rediscovery of the endangered giant pangolin (Smutsia gigantea) in Senegal after 24 years 24 年后在塞内加尔重新发现濒危大穿山甲（Smutsia gigantea）

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-05-17 DOI: 10.1111/aje.13279

Mouhamadou Mody Ndiaye, Marine Drouilly, Abdoul Aziz Senghor, Ousmane Thiaw, Daniel J. Ingram, Matthew H. Shirley, Paolo Strampelli, Chele Martinez Marti, Philipp Henschel

引用次数: 0

Multilevel sociality in the spotted hyaena: How to live in large groups without falling prey to the infertility trap 斑鬣狗的多层次社会性：如何在大群体中生活而不陷入不育陷阱

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-05-17 DOI: 10.1111/aje.13277

R. I. M. Dunbar

{"title":"Multilevel sociality in the spotted hyaena: How to live in large groups without falling prey to the infertility trap","authors":"R. I. M. Dunbar","doi":"10.1111/aje.13277","DOIUrl":"10.1111/aje.13277","url":null,"abstract":"Spotted hyaenas live in unusually large social groups for a carnivore. Since, all else equal, the ‘infertility trap’ (a negative relationship between fertility and the number of females in a group) limits social group sizes to ~5 reproductive females in mammals, hyaena must, like other very social species, have found a way to mitigate the stresses involved in order to do so. From a comparative analysis of data from 19 well-studied Crocuta crocuta populations, I show (1) that the distribution of hyaena clan sizes is multimodal, with a fractal scaling ratio close to 3 and a base unit of 12–15 individuals (3–5 reproductive females), (2) that fertility is a negative function of number of females in the group and (3) that there is a trade-off between the benefits of having more males in the group and the costs incurred by having more females. Although females do buffer themselves against the infertility trap by forming matrilineal alliances (thereby creating a primate-like multilevel structure), males seem to play an important role, such that, in areas with a low density of males, clan sizes are much smaller.","PeriodicalId":7844,"journal":{"name":"African Journal of Ecology","volume":"62 2","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aje.13277","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

DIY your captures when everything else fails: Description of an artisanal dart launcher with an assessment of the medium-term response in a primate 当一切都失败时，DIY 你的捕获器：描述手工飞镖发射器，评估灵长类动物的中期反应

IF 1 4区环境科学与生态学

African Journal of Ecology Pub Date : 2024-05-17 DOI: 10.1111/aje.13276

Alexandre Corbeau, Elsa Minot, Clara Tanvier, Pascaline Le Gouar, Guillaume Péron

引用次数: 0