Biotropica最新文献_第9页

Topography influences the tree dynamics of a tropical dry forest in western Mexico 地形对墨西哥西部热带干旱森林树木动态的影响

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-07-05 DOI: 10.1111/btp.13361

Alexis Arriaga-Ramírez, Moisés Méndez-Toribio, Guillermo Ibarra-Manríquez, Leonel Lopez-Toledo

{"title":"Topography influences the tree dynamics of a tropical dry forest in western Mexico","authors":"Alexis Arriaga-Ramírez, Moisés Méndez-Toribio, Guillermo Ibarra-Manríquez, Leonel Lopez-Toledo","doi":"10.1111/btp.13361","DOIUrl":"10.1111/btp.13361","url":null,"abstract":"In seasonally dry tropical forests (SDTF's) drought risk driven by topography-related factors determines vegetation structure, functional composition, and species diversity; however, the effect of slope aspect and topographic position on tree community dynamics are still poorly explored. In this paper, we studied the dynamics and structural attributes of the tree community of a Mexican SDTF. Plots were established in a combination of two topographic conditions: slope aspect (north/south) and topographic position (upper/middle/lower). Differences among these conditions were assessed through (i) community dynamics´ parameters, (ii) species dynamics, (iii) vegetation structure, and (iv) species diversity. We analyzed community attributes for each of our study years (2012–2020) and rates of change between this period for the entire community (DBH ≥1 cm), small-sized trees (DBH ≤3 cm), and large-sized trees (DBH >3 cm). Multivariate analyses were also used to examine the relationship between vegetation and topography. In upper positions, trees showed higher mortality (mean mr ± SE = 3.1 ± 0.2% yr − 1) and lower recruitment rates (mean rr ± SE = 6.3 ± 0.9% yr − 1) than those from the lower positions (mean mr ± SE = 1.7 ± 0.1% yr − 1; mean rr ± SE = 7.7 ± 0.7% yr − 1). The relative change (%) in the number of individuals for the entire community and small-sized trees increased towards the lower positions. The entire community showed a temporary loss of stems on south-facing slopes, but temporary gains in number of stems in lower positions for the small-sized trees. We did not find any temporary changes in species diversity attributes. The drought risk gradient imposed by topographic position influences the tree dynamics with a higher mortality of stems/individuals towards upper positions, but species diversity was maintained.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572736","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

Negative shoot phototropism in a climber and an epiphyte 攀援植物和附生植物的负向光性芽

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-07-02 DOI: 10.1111/btp.13357

Tomasz P. Wyka

引用次数: 0

Still little evidence of poleward range shifts in the tropics, but lowland biotic attrition may be underway 热带地区向极地转移的证据仍然很少，但低地生物损耗可能正在发生

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-07-02 DOI: 10.1111/btp.13358

Robert K. Colwell, Kenneth J. Feeley

{"title":"Still little evidence of poleward range shifts in the tropics, but lowland biotic attrition may be underway","authors":"Robert K. Colwell, Kenneth J. Feeley","doi":"10.1111/btp.13358","DOIUrl":"10.1111/btp.13358","url":null,"abstract":"Sixteen years ago, Colwell et al. (2008: Global warming, elevational range shifts, and lowland biotic attrition in the wet tropics. Science, 322, 258) affirmed predictions that climate change and rising global temperatures would lead to widespread upslope range shifts of tropical species but predicted that poleward range shifts would be unlikely within the terrestrial wet tropics, because of the shallow latitudinal temperature gradient. They also predicted “biotic attrition” (a net loss of species) in equatorial lowlands, where no warmer regions exist as a source of more-thermophilic species to replace species shifting upslope. Based on three recently published literature reviews of range shifts, covering more than 450 studies and thousands of species worldwide, we document more than 20 cases of elevational range shifts within the tropics, but we find no unambiguous examples of a latitudinal range shift for any fully tropical terrestrial species. In contrast, outside the tropics, the majority of documented range shifts are latitudinal. We summarize the state of knowledge about climate-driven species range shifts in the terrestrial tropics and highlight the potential for climate change to cause extensive and widespread declines in lowland alpha diversity.Abstract in Spanish is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.13358","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512595","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

From the front door to the basement: Invertebrate communities' structure as a proxy for determining cave zonation in Neotropics 从前门到地下室：无脊椎动物群落结构是确定新热带地区洞穴分区的替代物

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-06-25 DOI: 10.1111/btp.13356

Paulo C. Reis-Venâncio, Rodrigo L. Ferreira, Marconi Souza-Silva

{"title":"From the front door to the basement: Invertebrate communities' structure as a proxy for determining cave zonation in Neotropics","authors":"Paulo C. Reis-Venâncio, Rodrigo L. Ferreira, Marconi Souza-Silva","doi":"10.1111/btp.13356","DOIUrl":"10.1111/btp.13356","url":null,"abstract":"In caves, the absence of natural light in deeper regions starkly contrasts with the entrance areas, which still exhibit a light gradient extending into the cave interior. This interplay with the structural gradient of the environment potentially exerts distinct influences on invertebrate communities residing in different cave light zones. To investigate this, we formulated a hypothesis positing that communities within distinct cave light zones respond differently to habitat structure and microclimatic conditions. Our approach involved a spatial multi-scale sampling of invertebrates and the application of statistical analyses to contrast the responses of communities inhabiting photic and aphotic zones. Photic zone richness is influenced by factors such as air moisture, resource availability, root presence, and shelter diversity. In contrast, the richness of communities in aphotic zones is shaped by resource availability, the presence of roots, branches, and distance from the cave entrance. As expected, the richness in the photic zone surpasses that of the deeper regions, highlighting the challenges faced by invertebrates attempting to establish themselves in the aphotic zone. The species composition of faunal communities varied predictably from the entrance to the aphotic zone, and the three most important factors driving this variation were geographic distance, humidity, and distance from the entrance. The composition between these cave zones differs significantly, primarily due to the high number of obligate cave species predominantly inhabiting the aphotic region. Indeed, communities associated with different cave zones exhibit distinct responses to resource, microclimatic, and structural variables.Abstract in Portuguese is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501003","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

Seabird presence and seasonality influence nutrient dynamics of atoll habitats 海鸟的存在和季节性影响环礁栖息地的营养动态

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-06-24 DOI: 10.1111/btp.13354

Jennifer Appoo, Nancy Bunbury, Jake Letori, Aurelie Hector, Annie Gendron, Nicholas A. J. Graham, Gerard Rocamora, Matthieu Le Corre, Sébastien Jaquemet

{"title":"Seabird presence and seasonality influence nutrient dynamics of atoll habitats","authors":"Jennifer Appoo, Nancy Bunbury, Jake Letori, Aurelie Hector, Annie Gendron, Nicholas A. J. Graham, Gerard Rocamora, Matthieu Le Corre, Sébastien Jaquemet","doi":"10.1111/btp.13354","DOIUrl":"10.1111/btp.13354","url":null,"abstract":"Marine nutrients underpin productivity and functioning of oceanic island ecosystems. On islands where they nest, seabirds represent a primary source of marine nutrients. In tropical regions, some of the largest seabird populations nest on atolls, yet there is limited information available on seabird contributions to atoll ecosystem nutrient dynamics. To investigate the spatial and seasonal dynamics of seabird contributions, we assessed seabird colonies of different taxa, including red-footed boobies and terns, nesting on separate islands of Farquhar Atoll, Seychelles. We assessed nutrient concentrations of guano, soil, coastal plants, and nearby seagrass in seabird colonies and at a control island with no seabirds, during the wet and dry seasons. Sooty terns contributed the highest quantities of nutrients, estimated at 71.2 N tonne/year and 52.2 P tonne/year. Seabird-derived nutrient transfer occurred year-round from seabird colonies to soil, coastal plants and seagrass. Soil macro- and inorganic nutrients were higher in the high-density tern colony and during the dry season, coinciding with the breeding period of sooty terns. Both red-footed booby and tern colonies maintained high nitrogen levels in coastal plants year-round, while phosphorus levels did not differ between islands or seasons. Seabird-derived nitrogen reversed nitrogen limitation of seagrass during the dry season. We provide the first insights into seabird nutrient contributions to atoll ecosystems in Seychelles, with recommendations for seabird conservation to boost and support atoll and island ecosystem resilience. Our results from a relatively undisturbed atoll serve as a baseline with which more impacted atolls and future changes can be assessed.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.13354","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501079","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

A jumping terrestrial leech from Madagascar 马达加斯加的一种跳跃式陆生水蛭

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-06-20 DOI: 10.1111/btp.13340

Mai Fahmy, Michael Tessler

引用次数: 0

Lost in Amazon: Evidencing the southern extension of the geographic distribution of Linné's two-toed sloth (Choloepus didactylus) 迷失在亚马逊：林内双趾树懒（Choloepus didactylus）地理分布南延的证据

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-06-19 DOI: 10.1111/btp.13353

Arlison Bezerra Castro, Mateus Melo-Dias, Tatiane Pires Santos, Rogério José Custódio, Domingos de Jesus Rodrigues, Clarissa Alves Rosa

引用次数: 0

Seed functional traits as predictors of seedling establishment success in Brazilian tropical forest restoration 预测巴西热带森林恢复中幼苗成活率的种子功能特征

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-06-14 DOI: 10.1111/btp.13355

Diego Cerveira de Souza, Vera Lex Engel

{"title":"Seed functional traits as predictors of seedling establishment success in Brazilian tropical forest restoration","authors":"Diego Cerveira de Souza, Vera Lex Engel","doi":"10.1111/btp.13355","DOIUrl":"10.1111/btp.13355","url":null,"abstract":"Several ecological filters in deforested and degraded areas reduce seedling emergence and establishment and hinder ecological restoration by direct seeding. Understanding whether functional traits are related to a species' capacity to overcome these filters and predict their field performance might improve the success of direct seeding techniques for ecological restoration. We assessed eight seed functional traits of tropical tree species, seeking those that best explained their establishment success in direct seeding restoration projects. We analyzed a dataset from 52 studies that tested direct seeding techniques with tree species in Brazil. From each study, we collected the mean establishment percentage for all tree species. Seed mass, cotyledon function, and germination speed were the only functional traits that significantly affected the species establishment percentage in direct seeding restoration projects. Species with larger seeds, storage cotyledons, and faster germination had higher establishment percentages. Choosing species with these functional traits for seed mixes will provide higher establishment percentages and, consequently, improve restoration success by direct seeding techniques.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141340120","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

Impacts of large dams on Amazonian floodplain bird communities 大型水坝对亚马逊洪泛平原鸟类群落的影响

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-06-14 DOI: 10.1111/btp.13351

Gustavo de Melo Martins, Juliana Menger, Tomaz Nascimento de Melo, Camila Cherem Ribas

{"title":"Impacts of large dams on Amazonian floodplain bird communities","authors":"Gustavo de Melo Martins, Juliana Menger, Tomaz Nascimento de Melo, Camila Cherem Ribas","doi":"10.1111/btp.13351","DOIUrl":"10.1111/btp.13351","url":null,"abstract":"Amazon river floodplains sustain distinct kinds of seasonally flooded habitats along with their specialized biota. River sediment load and geomorphology determine vegetation physiognomy and the occurrence of specialized taxa. Hydropower dams disrupt the annual flooding cycle, affecting the floodplain habitats and associated avifauna. Our goal was to understand how permanent flooding caused by large dams affects taxonomic, functional, and phylogenetic diversity of bird communities in two Amazonian rivers with distinct characteristics. We sampled 35 sites, including undisturbed sites and sites impacted by the permanent flooding caused by large dams operating on the Madeira and Xingu rivers since 2012 and 2016, respectively. We recorded 202 bird species through passive acoustic monitoring. We did not find differences in mean species richness between rivers or between impacted vs. undisturbed sites. However, we found species turnover between distinct river basins and between sites. Undisturbed sites were characterized by floodplain specialists and were more phylogenetically clustered and functionally more similar than impacted sites, which were occupied by more generalist species from different phylogenetic clades, with distinct functional traits. By assessing multiple dimensions of bird diversity, we show that permanent flooding leads to extensive changes in the floodplain avifauna, favoring generalist over specialist species and thus reducing the uniqueness of the affected communities. We demonstrate that alpha diversity metrics alone are insufficient to characterize the impacts of river damming on Amazonian floodplain avifauna. To properly monitor dams' environmental impacts, additional measures of community change should be standardized, with emphasis on species replacements in seasonally flooded environments.Abstract in Portuguese is available with online material.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141343061","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

Tropical timber plantations as habitat for ground-dwelling mammals: A camera-trapping assessment in Central Panama 作为地栖哺乳动物栖息地的热带木材种植园：巴拿马中部相机诱捕评估

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2024-06-13 DOI: 10.1111/btp.13352

Claudio M. Monteza-Moreno, Mark N. Grote, Jefferson S. Hall, Patrick A. Jansen

{"title":"Tropical timber plantations as habitat for ground-dwelling mammals: A camera-trapping assessment in Central Panama","authors":"Claudio M. Monteza-Moreno, Mark N. Grote, Jefferson S. Hall, Patrick A. Jansen","doi":"10.1111/btp.13352","DOIUrl":"10.1111/btp.13352","url":null,"abstract":"Reforestation projects in the tropics often consist of plantations, typically monocultures of non-native timber species. It has been questioned whether such plantations are suitable as wildlife habitat, but empirical evidence is scarce, especially on plantations embedded on highly disturbed landscapes. Here, we compare species richness and occupancy of ground-dwelling mammals between five types of plantations within a single area in Central Panama, the narrowest tract of the Mesoamerican Biological Corridor. We deployed camera traps at stratified random points and followed a hierarchical modeling approach to compare community composition and occupancy between plantation types. We found a total of 16 ground-dwelling mammals in the area, most of which were small-bodied and short-lived, and the majority of species' occupancy probabilities were below 0.5 at any given plantation. Teak (Tectona grandis) plantations, which covered the largest area in the study, had the lowest estimated richness and occupancy, with occupancy probabilities exceeding 0.5 for just three species. Conversely, plantations of the native Pachira quinata and the non-native Gmelina arborea, covering an area four and nineteen times smaller than Teak, respectively, had higher richness and occupancy. Occupancy values were intermediate in the Acacia and mixed plantation types. Our findings suggest that plantations embedded in lowland tropical landscapes have limited conservation value for large-bodied mammals, and are ecologically constrained habitats for small- and medium-sized mammals.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"56 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.13352","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141347961","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