Biotropica最新文献_第8页

Knowledge gaps and opportunities for conservation with orchid collectors in Vietnam 越南兰花收藏者在保护方面的知识差距和机遇

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-26 DOI: 10.1111/btp.13376

Elizabeth Oneita Davis, Adam Graves, Heinfried Block, Christy Powell, Trung Tien Cao

{"title":"Knowledge gaps and opportunities for conservation with orchid collectors in Vietnam","authors":"Elizabeth Oneita Davis, Adam Graves, Heinfried Block, Christy Powell, Trung Tien Cao","doi":"10.1111/btp.13376","DOIUrl":"https://doi.org/10.1111/btp.13376","url":null,"abstract":"Unsustainable harvesting of orchid species is a critical, global threat to orchid diversity and abundance, fueled by domestic and global demand. However, drivers of demand continue to be under-explored, despite opportunities for proactive engagement and/or behavior change strategies with and/or directed at orchid collectors. In this study, we surveyed self-identified Vietnamese orchid collectors, some of whom were also known to engage in wild harvesting of endangered species, to understand sociological dimensions including motivations, knowledge, attitudes, behaviors, and conservation ethos. We found that knowledge about domestic and international regulations was low, and that orchid collectors were likely to believe that Vietnam has plenty of orchids left in the wild. Orchid collectors were highly willing to share their expertise and collections with international NGOs, and receive advice on propagation of orchid species. Through Bayesian logistic regression, we found no statistically significant influence of demographic attributes on the behavior of harvesting from the wild; however, having access to propagation equipment and supplies increased the likelihood of wild harvest. Accurate knowledge (awareness) is a key first step in the behavior change process. We suggest the implementation of awareness-raising campaigns targeted at Vietnamese orchid collectors, which communicate domestic and international restrictions about orchid harvest and trade, as well as the known status of orchid species in the wild. Additionally, we suggest that an opportunity exists to recruit Vietnamese orchid collectors into a formal network for knowledge-sharing and the co-creation of sustainable guidelines around keeping and propagating orchids.Abstract in Vietnamese is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.13376","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Thin corridors limit wildlife: Variance of tropical carnivore distribution and habitat use in a critical rainforest corridor 稀疏的走廊限制了野生动物的活动：热带食肉动物在重要雨林走廊中的分布和栖息地利用差异

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-25 DOI: 10.1111/btp.13384

Patrick H. Ross, Erik Patel, Rojo Nandrianina Ravelojaona, Charles Rasolondravoavy, Guy Irenel Raoloniana, Luke Dollar, Patricia G. Parker

{"title":"Thin corridors limit wildlife: Variance of tropical carnivore distribution and habitat use in a critical rainforest corridor","authors":"Patrick H. Ross, Erik Patel, Rojo Nandrianina Ravelojaona, Charles Rasolondravoavy, Guy Irenel Raoloniana, Luke Dollar, Patricia G. Parker","doi":"10.1111/btp.13384","DOIUrl":"https://doi.org/10.1111/btp.13384","url":null,"abstract":"Madagascar is acclaimed for its floral and faunal endemism and biodiversity. Among the island nation's most emblematic fauna are its native mammalian carnivores; they are members of the threatened and endemic Eupleridae family. The Corridor of Marojejy, Anjanaharibe-Sud Special Reserve, Tsaratanana (COMATSA) is a newly protected corridor system that faces deforestation and lacks detailed assessments of its native carnivore community. We deployed 44 motion-activated trail cameras to identify which terrestrial carnivores are found within the rainforest corridor landscape of COMATSA-Sud and Marojejy National Park, and to examine carnivore occupancy, relative activity and the impacts of habitat edge. Our sampling array operated from October 20, 2021, to February 10, 2022 (113 days) and confirmed the presence of four species in Eupleridae: Cryptoprocta ferox, Fossa fossana, Galidia elegans, and Galidictis fasciata, as well as a non-native carnivore species: Canis familiaris. We show that carnivore occurrences significantly increase with distance to forest edges. We discuss the negative impacts of forest loss on native carnivores and highlight the threats posed by the non-native carnivore C. familiaris. Our findings spotlight faunal detections across the corridor and indicate that fewer native carnivores are found in the corridor compared to nearby protected areas, suggesting that deforestation correlates with a skewed distribution of carnivore detections. Based on our data, we provide management recommendations for the protection of the forest corridor and its endemic faunal community.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.13384","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Weathering the storm: Long-term implications on the feeding ecology and habitat use of a frugivorous lemur following a tropical cyclone 抵御风暴：热带气旋过后对食俭狐猴觅食生态和栖息地利用的长期影响

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-25 DOI: 10.1111/btp.13385

Leslie A. Paige, Luca Santini, Delaid C. Rasamisoa, Antonin Andriamahaihavana, Jörg U. Ganzhorn, Dean Gibson, Megan A. Owen, Josia Razafindramanana, Natalie Vasey, Giuseppe Donati, Timothy M. Eppley

{"title":"Weathering the storm: Long-term implications on the feeding ecology and habitat use of a frugivorous lemur following a tropical cyclone","authors":"Leslie A. Paige, Luca Santini, Delaid C. Rasamisoa, Antonin Andriamahaihavana, Jörg U. Ganzhorn, Dean Gibson, Megan A. Owen, Josia Razafindramanana, Natalie Vasey, Giuseppe Donati, Timothy M. Eppley","doi":"10.1111/btp.13385","DOIUrl":"https://doi.org/10.1111/btp.13385","url":null,"abstract":"Tropical cyclones are stochastic—sometimes catastrophic—weather events that can shape the ecology of impacted regions and have long-lasting effects on ecosystems. These destructive events are concerning for species persistence in areas with high endemism. Madagascar is among the world's most biodiverse hotspots and given the island's location within the southwest Indian Ocean, it is frequently impacted by cyclones. In March 2018, Cyclone Eliakim made landfall in northeast Madagascar, passing the species range of the predominantly frugivorous red ruffed lemur (Varecia rubra), allowing us to document their response. In addition to characterizing the forest damage, we conducted behavioral and feeding ecology data collection over 57 months from March 2018 to November 2022. We evaluated temporal adjustments in lemur behavioral and dietary strategies over a nearly five-year period, during which there were no recorded tropical storms or cyclones over the Masoala Peninsula despite landfall elsewhere. Cyclone destruction was concentrated on large trees, which subsequently reduced fruit availability. Our results showed lemurs consumed a greater proportion of leaves and utilized more canopy strata following the cyclone, representing an immediate ecological response. Red ruffed lemurs' broad dietary and microhabitat diversity gradually returned to their more typical ecological niche as their habitat recovered. Our research highlights the ecological flexibility of a dietary specialist in response to a destructive cyclone, a behavioral adjustment that is likely to have evolved under Madagascar's highly variable weather and aids this species' persistence following stochastic weather events.Abstract in Malagasy is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Anthropogenic landscape features affect the ground habitat use of Penelope superciliaris (Cracidae), a large seed disperser bird in southeastern Brazil 人为景观特征影响巴西东南部大型种子播撒鸟 Penelope superciliaris (Cracidae) 对地面栖息地的利用

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-24 DOI: 10.1111/btp.13382

Pâmela Rodrigues Braga, Marcella do Carmo Pônzio, Nielson Pasqualotto, Vinicius Alberici, Roberta Montanheiro Paolino, Rodolpho Credo Rodrigues, Adriano Garcia Chiarello

{"title":"Anthropogenic landscape features affect the ground habitat use of Penelope superciliaris (Cracidae), a large seed disperser bird in southeastern Brazil","authors":"Pâmela Rodrigues Braga, Marcella do Carmo Pônzio, Nielson Pasqualotto, Vinicius Alberici, Roberta Montanheiro Paolino, Rodolpho Credo Rodrigues, Adriano Garcia Chiarello","doi":"10.1111/btp.13382","DOIUrl":"https://doi.org/10.1111/btp.13382","url":null,"abstract":"The expansion of agriculture and forest plantations over tropical biomes has caused significant species loss, while others persist in remnant native areas and anthropogenic lands. Penelope superciliaris, a large seed disperser bird, inhabits human-modified landscapes; however, its habitat use is poorly known. We investigated how native land covers, distance to water sources, and anthropogenic landscape features affect the species' ground habitat use in disturbed and undisturbed areas of three landscapes in Southeastern Brazil. We expected the species to use the ground more in native areas and near water sources because of the higher habitat quality. We collected presence-absence data during two dry seasons at 205 sampling stations with camera traps. Using occupancy models, we calculated the cumulative AICc weights of covariates for occupancy (interpreted as probability of use, Ψ) and detection (interpreted as frequency of use, p) parameters. The proportion of managed forests negatively influenced the species' frequency of use. The probability of use was higher when camera trap stations were located on unpaved roads. Model averaged prediction showed that the species uses about 56% of the landscapes. Our results suggest that intensively managed forests are not favorable or attractive habitats for the species. Unpaved roads associated with native vegetation edges may provide valuable habitats for the species during the dry season, possibly associated with movement and resource tracking. These findings may help guide conservation strategies in such modified landscapes, with caution in considering unpaved roads as secure habitats until further data on population abundance are available.Abstract in Portuguese is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Vertebrate seed predation can limit recruitment of later-successional species in tropical forest restoration 有脊椎动物对种子的捕食会限制热带森林恢复中后期演替物种的新陈代谢

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-24 DOI: 10.1111/btp.13381

Francis H. Joyce, Brianna M. Ramos, Rakan A. Zahawi, Karen D. Holl

{"title":"Vertebrate seed predation can limit recruitment of later-successional species in tropical forest restoration","authors":"Francis H. Joyce, Brianna M. Ramos, Rakan A. Zahawi, Karen D. Holl","doi":"10.1111/btp.13381","DOIUrl":"https://doi.org/10.1111/btp.13381","url":null,"abstract":"The effects of vertebrate seed predation on the regeneration of restored forests are not well understood because most past studies have focused on seed predation within the first few years after restoration and have measured seed removal without quantifying subsequent seedling establishment of seeds that avoid predation. Quantifying the establishment of seeds that escape predation in restored forests at later stages of regrowth is crucial for anticipating longer-term recovery trajectories. Here, we evaluated the potential role of vertebrate seed predators in limiting recruitment of later-successional tree species in nine forests actively restored ≥15 years prior and in four paired remnant forest fragments embedded in an agricultural landscape in southern Costa Rica. We conducted seed addition experiments with four tree species inside and outside vertebrate exclosures and used camera trapping to detect seed predators. To determine the fate of seeds that avoided predation, we also measured seedling establishment after 1 year, given that other mortality factors may compensate in the absence of vertebrate seed predation. We detected two species of birds and five species of granivorous mammals removing seeds. Seed tagging indicated that most removal resulted in predation. For three of the four tree species tested, vertebrate seed predation reduced seedling establishment. The magnitude of this effect depended on species' susceptibility to other causes of mortality during the seed-to-seedling transition. Our study demonstrates that vertebrate seed predators can substantially reduce later-successional seedling recruitment in restored forests and should be considered alongside dispersal limitation and microsite conditions as factors slowing forest recovery.Abstract in Spanish is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Taxonomic, functional, and phylogenetic diversity of anuran assemblages across habitats and seasons in a Neotropical savanna 新热带稀树草原不同生境和季节无尾类动物群落的分类、功能和系统发育多样性

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-19 DOI: 10.1111/btp.13383

Rafael Assis Barros, Tainá Figueras Dorado-Rodrigues, Rafael Martins Valadão, Christine Strüssmann

{"title":"Taxonomic, functional, and phylogenetic diversity of anuran assemblages across habitats and seasons in a Neotropical savanna","authors":"Rafael Assis Barros, Tainá Figueras Dorado-Rodrigues, Rafael Martins Valadão, Christine Strüssmann","doi":"10.1111/btp.13383","DOIUrl":"10.1111/btp.13383","url":null,"abstract":"Differences between habitats and seasonal changes in climate are some of the main factors responsible for shaping diversity patterns and biological community structures. In this context, anurans are considered excellent models for ecological studies due to their high sensitivity to environmental changes. This study analyzed how differences between open and forested formations and seasonality influence the taxonomic, functional, and phylogenetic diversity of anuran assemblages in an area of Neotropical savanna. Parameters of taxonomic (species richness—SR), functional (functional diversity—SES.FD, functional dispersion—FDis, and functional redundancy—FR), and phylogenetic diversity (phylogenetic species variability—PSV and phylogenetic species richness—PSR) were used to quantify spatiotemporal changes in the anuran assemblages. Sampling was carried out over 15 months, using pitfall traps and active searches. In total, we recorded 598 individuals belonging to 21 species and seven families. Species composition, SR, and PSR differed between habitats and seasons, the latter two being higher in open formations during the rainy season. SES.FD differed seasonally and was higher in the dry season. FDis, FR, and PSV did not differ between treatments. Anurans from forested formations were functionally and phylogenetically clustered during the rainy season, while those from open formations were functionally clustered during the same season. Habitat type and seasonal variation were important in determining the taxonomic, functional, and phylogenetic diversity of the anuran assemblages. However, changes in climate and land use are expected to negatively impact the ecological and evolutionary diversity of these organisms in the Cerrado, reinforcing the importance of conservation policies and actions.Abstract in Portuguese is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Citizen science and color pattern analysis indicate unreported Batesian mimicry between Neotropical snakes 公民科学和色彩图案分析表明，新热带蛇类之间的贝茨拟态现象未得到报道

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-19 DOI: 10.1111/btp.13380

Filipe C. Serrano, Carolina Farhat, Juan C. Díaz-Ricaurte, Marcio Martins

{"title":"Citizen science and color pattern analysis indicate unreported Batesian mimicry between Neotropical snakes","authors":"Filipe C. Serrano, Carolina Farhat, Juan C. Díaz-Ricaurte, Marcio Martins","doi":"10.1111/btp.13380","DOIUrl":"https://doi.org/10.1111/btp.13380","url":null,"abstract":"Batesian mimics decrease their chance of predation by their resemblance to different, dangerous or unpalatable species but this relationship is often inferred without quantitative approaches. Snakes are notorious Batesian mimics, especially the Neotropical genus Xenodon, which comprises species that are putative mimics of venomous snakes such as coral snakes (genus Micrurus) and lanceheads (or “fer-de-lance,” genus Bothrops). Herein, we propose that Xenodon severus is a batesian mimic of the sympatric and highly venomous Amazonian bushmaster (Lachesis muta), the longest viper in the world, and not of lanceheads (Bothrops spp.). We compiled all available photographs of X. severus from citizen science platforms and published literature to test this mimicry through a quantitative dorsal color pattern analysis between this species and both L. muta and a lancehead Bothrops brazili. We classified georeferenced photographs as potential “mimic” or “non-mimic” and tested whether “mimics” were found on average closer to L. muta's range centroid than “non-mimics.” The color pattern analysis showed that X. severus is more similar to L. muta than to B. brazili. Furthermore, “mimics” were significantly closer to the centroid of L. muta. Our results suggest that X. severus is likely a mimic of L. muta and that this relationship may vary across their distribution. Our findings highlight the significant role of citizen science platforms in assessing ecological relationships and the importance of using quantitative methods such as dorsal color pattern analysis to test mimicry.Abstract in Portuguese is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Seeking a multi-dimensional approach to understand agricultural commodity expansion in Asian tropics 寻求一种多维方法来理解亚洲热带地区的农业商品扩张

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-16 DOI: 10.1111/btp.13375

Anushka Rege, Manan Bhan, Jagdish Krishnaswamy, Sheetal Patil, Indira Singh, Wenxiu Xu, Siyan Zeng

{"title":"Seeking a multi-dimensional approach to understand agricultural commodity expansion in Asian tropics","authors":"Anushka Rege, Manan Bhan, Jagdish Krishnaswamy, Sheetal Patil, Indira Singh, Wenxiu Xu, Siyan Zeng","doi":"10.1111/btp.13375","DOIUrl":"10.1111/btp.13375","url":null,"abstract":"Agricultural commodity expansion into natural and semi-natural ecosystems in Asia is a multi-dimensional sustainability challenge posing a threat to natural and human capital. At the symposium pertaining to agricultural commodity landscapes organized at the 59th meeting of the Association for Tropical Biology and Conservation, we aimed to identify key aspects that require further attention to address the negative impacts of commodity-driven agricultural expansion in the Asian tropics. Using a combination of insights obtained both from participants' research and those that developed organically in the symposium, we identified five key themes: (1) Robust land use suitability assessments to determine the viability of agricultural expansion or other competing demands on productive land in given landscapes; (2) the need for plot-level studies of soil biodiversity and ecological functions for commodity crops; (3) Irrigation for commodity crops with blue and green water and evaluating co-dependent drivers and outcomes; (4) an improved understanding of local producer motivations and supply chains and (5) the analysis of co-benefits, trade-offs and synergies in agro-commodity systems. These themes include the various steps involved in agricultural commodity expansion, right from land selection and crop patterns to aspects pertaining to the post-harvest value chain. These themes are inter-connected and span across multiple local and regional spatial scales in tropical Asia but hold relevance to agricultural landscapes elsewhere too. Immediate and sustained attention on these themes would secure multiple goals of sustainable land use, biodiversity conservation, climate change mitigation and human well-being.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.13375","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Domestic dogs and vultures feed on the same carcasses in Wayanad Wildlife Sanctuary, Kerala, India 印度喀拉拉邦韦瓦纳德野生动物保护区的家犬和秃鹫以同一具尸体为食

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-12 DOI: 10.1111/btp.13377

O. Vishnu, J. Pandiyan, Aswathy Balan, Clince P. Jose, R. Roshnath

引用次数: 0

Seed dispersal of Madagascar's iconic baobab species, Adansonia grandidieri 马达加斯加标志性猴面包树种 Adansonia grandidieri 的种子传播

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-09-10 DOI: 10.1111/btp.13373

Seheno Andriantsaralaza, O. H. Razafindratsima, O. H. Razanamaro, V. Ramananjato, F. Randimbiarison, N. N. Raoelinjanakolona, T. H. P. Rabarijaonina, N. Raharinomena, N. Hobimalala, R. H. Nantenaina, J. M. Tonos, S. Andriamiadana

{"title":"Seed dispersal of Madagascar's iconic baobab species, Adansonia grandidieri","authors":"Seheno Andriantsaralaza, O. H. Razafindratsima, O. H. Razanamaro, V. Ramananjato, F. Randimbiarison, N. N. Raoelinjanakolona, T. H. P. Rabarijaonina, N. Raharinomena, N. Hobimalala, R. H. Nantenaina, J. M. Tonos, S. Andriamiadana","doi":"10.1111/btp.13373","DOIUrl":"10.1111/btp.13373","url":null,"abstract":"Certain plant species have traits adapted for seed dispersal by megafauna, which may be absent in their current ranges. Characterizing the dispersal mechanism of such plant species can provide insights about their population dynamics and regeneration. We investigated the effectiveness of the extant fauna as seed dispersers of the Malagasy baobab, Adansonia grandidieri, which have megafaunal dispersal traits. We documented the animal species that interact with its fruits and seeds in the canopy and on the ground through direct observations, camera trapping, opportunistic search of feces with seeds, and dispersal experiments. We also estimated seed fate using a model parameterized with data obtained through experiments on seed removal and seed germination under and away from adult A. grandidieri trees. Further, we examined the impacts of seed dispersal in mitigating herbivore pressures on A. grandidieri seedling through an exclosure experiment. We did not find animals interacting with fruits in the canopy. However, we observed a native rodent species, Eliurus myoxinus, handling fruits/seeds on the ground, and found seeds in bush pig feces. Also, while the rates of germination for the dispersed A. grandidieri seeds were low, their probability of producing viable seedlings was higher than when the seeds stayed under adult trees. We also found that the seedlings of A. grandidieri had a high probability of surviving even when herbivores were present. Overall, our results provide insights into the regeneration of A. grandidieri and suggest that some extant local ground-dwelling fauna can provide seed dispersal services to this species.Abstract in Malagasy is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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