Biotropica最新文献_第4页

Effects of Vegetation Density on the Diversity of Lizards in an Area of the Brazilian Cerrado 植被密度对巴西塞拉多地区蜥蜴多样性的影响

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-04-08 DOI: 10.1111/btp.70022

Bruno F. Fiorillo, Liliana Piatti, Marcio Martins

{"title":"Effects of Vegetation Density on the Diversity of Lizards in an Area of the Brazilian Cerrado","authors":"Bruno F. Fiorillo, Liliana Piatti, Marcio Martins","doi":"10.1111/btp.70022","DOIUrl":"https://doi.org/10.1111/btp.70022","url":null,"abstract":"<div>\u0000 \u0000 <p>The Cerrado is a highly threatened biome that harbors a great portion of Brazilian biodiversity, including many endemic species. Such richness may reflect its environmental heterogeneity, which includes different vegetation types (from grasslands to forests). Several endemic species in the Cerrado are strongly associated with open vegetation types. Recent studies have shown that woody encroachment can negatively impact several components of biodiversity. In the present study, we provide information on variation in lizard diversity across different vegetation types in a protected area located in the southern portion of the Cerrado and evaluated the effect of vegetation density on lizard taxonomic, functional, and phylogenetic diversity. We predicted that the three aspects of lizard diversity would be negatively affected by vegetation density and that Beta diversity would vary significantly across the vegetation gradient. We confirmed nearly all of our predictions, except for functional diversity, which, contrary to our expectations, was positively influenced by vegetation density. We also found that Beta diversity indices based on both species composition/abundance and phylogenetic features of communities experience a significant turnover across the vegetation density gradient. This study greatly strengthens previous studies that suggest a negative impact of vegetation density (and, consequently, woody encroachment) on lizard diversity. Therefore, managers of protected areas in the Cerrado should consider the use of strategies to avoid woody encroachment, like fire management with prescribed fires.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143793617","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

Patterns of Leaf, Flower, and Fruit Phenology and Environmental Relationships in a Seasonal Tropical Forest in the Indian Eastern Himalaya 印度东喜马拉雅地区季节性热带森林的叶、花、果物候模式和环境关系

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-04-08 DOI: 10.1111/btp.70030

Aparajita Datta, Soumya Banerjee, Rohit Naniwadekar, Khem Thapa, Akanksha Rathore, Kumar Thapa, Turuk Brah, Tali Nabum, Narayan Mogar, Ushma Shukla, Swati Sidhu, Noopur Borawake

{"title":"Patterns of Leaf, Flower, and Fruit Phenology and Environmental Relationships in a Seasonal Tropical Forest in the Indian Eastern Himalaya","authors":"Aparajita Datta, Soumya Banerjee, Rohit Naniwadekar, Khem Thapa, Akanksha Rathore, Kumar Thapa, Turuk Brah, Tali Nabum, Narayan Mogar, Ushma Shukla, Swati Sidhu, Noopur Borawake","doi":"10.1111/btp.70030","DOIUrl":"https://doi.org/10.1111/btp.70030","url":null,"abstract":"<div>\u0000 \u0000 <p>Tree phenology plays an important role in determining the structure and function of tropical forest communities. However, there are few long-term studies on tree phenology from South Asia. We monitored 716 trees of 54 species monthly from 2011 to 2023 for leaf flush, flowering, and fruiting in the Pakke Tiger Reserve, Arunachal Pradesh, and North-east India. We examined monthly patterns in the percentage of species and trees in leaf flush, flower, and fruit and characterized phenological seasonality using circular statistics. We hypothesized that phenological patterns would show significant seasonality, with phenological activity being triggered by increasing solar irradiance and daylength. Flowering periodicity was classified using Fourier analysis, and we examined the relationships between phenological activity and temperature, rainfall, solar radiation, and daylength using GAMLSS. Leaf flush and flowering were moderately seasonal, peaking in the warm dry season. Fruiting patterns and their seasonality differed among dispersal modes. Most species (78.13%) and trees (51.17%) flowered annually. In accordance with our hypothesis, daylength and solar radiation served as proximate cues for phenological activity through nonlinear effects. This indicated the existence of narrow ranges of optimal climatic conditions for phenology. Rainfall was not an important proximate cue as water availability was not a constraint for tree phenology in the site. Our study is the first long-term phenological monitoring effort that establishes the proximate climatic cues for the observed patterns of leaf flush, flowering, and fruiting in the seasonal tropical forests of the Eastern Himalaya.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143793425","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

Long-Term Fire and Vegetation Change at Cocha Cashu Biological Station, Peru 秘鲁Cocha Cashu生物站的长期火灾和植被变化

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-04-04 DOI: 10.1111/btp.70010

C. N. H. McMichael, J. A. Watson, M. B. Bush

{"title":"Long-Term Fire and Vegetation Change at Cocha Cashu Biological Station, Peru","authors":"C. N. H. McMichael, J. A. Watson, M. B. Bush","doi":"10.1111/btp.70010","DOIUrl":"https://doi.org/10.1111/btp.70010","url":null,"abstract":"<p>Past human influence from the pre-Columbian and colonial periods may have played a role in shaping modern Amazonian vegetation. Here, we assessed past human activities and vegetation change from a well-studied research station in the Peruvian Amazon using charcoal and phytoliths recovered from soil cores. The moderate seasonality has contributed to its high diversity, while its remoteness has generally led to assumptions of minimal past land modification by humans. We asked: (i) Is there evidence of past human influence, including cultivation, forest opening, or plant enrichment/depletion, in the forests around Cocha Cashu Biological Station? and (ii) was there a consistent increase in palm phytolith abundances through time as has been documented in the aseasonal forests of northwestern Amazonia? Only 38 (14%) of the 279 samples analyzed contained charcoal, highlighting the rarity of past fire at Cocha Cashu. The two charcoal fragments large enough for <sup>14</sup>C dating had ages of 570–670 and 1350–1520 calibrated years before present. No cultivar phytoliths were found. Spheroid echinate phytoliths, produced by the palm genera <i>Attalea,</i> and <i>Oenocarpus</i>, and <i>Euterpe</i>, were more abundant in past samples than in modern samples. There was no increase in palm phytolith abundances from the bottom to top of the core, contrasting with recent findings from northwestern Amazonia. Our results support ideas that Cocha Cashu is composed of old growth forests and suggest that gradients of past human activities exist on local and regional scales in western Amazonia.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770324","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

120 Years of “Lemurology”: What has Changed? Lemurology" 120 年：发生了什么变化？

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-03-24 DOI: 10.1111/btp.70026

Veronarindra Ramananjato, Finaritra Randimbiarison, Seheno Andriantsaralaza, Anja R. S. Rafaharetana, Tanjoniaina H. N. P. Rabarijaonina, Hasinavalona Rakotoarisoa, N. Nancia Raoelinjanakolona, Diary N. Razafimandimby, Rindra H. Nantenaina, Njaratiana A. Raharinoro, Tsinjo S. A. Andriatiavina, Sandra M. Rasoarimalala, Harielle F. Ratianarinambinina, Mirana J. E. Rahariniaina, Onja H. Razafindratsima

{"title":"120 Years of “Lemurology”: What has Changed?","authors":"Veronarindra Ramananjato, Finaritra Randimbiarison, Seheno Andriantsaralaza, Anja R. S. Rafaharetana, Tanjoniaina H. N. P. Rabarijaonina, Hasinavalona Rakotoarisoa, N. Nancia Raoelinjanakolona, Diary N. Razafimandimby, Rindra H. Nantenaina, Njaratiana A. Raharinoro, Tsinjo S. A. Andriatiavina, Sandra M. Rasoarimalala, Harielle F. Ratianarinambinina, Mirana J. E. Rahariniaina, Onja H. Razafindratsima","doi":"10.1111/btp.70026","DOIUrl":"https://doi.org/10.1111/btp.70026","url":null,"abstract":"<p>Lemurs, a highly diverse primate group endemic to Madagascar, have captivated the attention of researchers for nearly 120 years. Here, we conducted a literature review and a bibliometric analysis to provide an overview of how various aspects of “Lemurology” or the scientific studies of lemurs, have changed over time. Focusing only on original scientific articles, we described the trends in the topics and taxa studied, the publication languages, the authorship, and study sites. We used two datasets: one from the Web of Science (WoS; 2223 articles) and another from three Madagascar-focused journals (MFJ; 329 articles). The observation of lemurs in the wild is the oldest form of Lemurology, starting under the French colonization, and remains the main data source for articles in both datasets. <i>Microcebus</i> and <i>Eulemur</i> are the most studied genera in WoS and <i>Propithecus</i> and <i>Eulemur</i> in MFJ. At this time, no articles are written in Malagasy, but English and French are the main languages used in Lemurology. Although Malagasy scientists are still underrepresented at the international level, there is a recent shift toward an increased number of Malagasy scientists as first and last authors. We found no gender bias in WoS, but MFJ exhibited noticeable male author dominance. Most Lemurology has been conducted at the Duke Lemur Center (USA), followed by Kirindy and Ranomafana forests in Madagascar. Lemurology thus shows different portraits at international and local levels, suggesting that unequal access to resources and opportunities may hinder the effective investigation and conservation of lemurs.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689416","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

Differences in Plant–Pollinator Network Structure and Pollinator Importance Between a Continental and an Oceanic Island Community 大陆与海洋岛屿群落植物传粉者网络结构及传粉者重要性的差异

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-03-24 DOI: 10.1111/btp.70027

Xiang-Ping Wang, Ma-Yin Tong, Yu Zhang, Zhong-Tao Zhao, Shi-Jin Li, Miao-Miao Shi, Tie-Yao Tu

{"title":"Differences in Plant–Pollinator Network Structure and Pollinator Importance Between a Continental and an Oceanic Island Community","authors":"Xiang-Ping Wang, Ma-Yin Tong, Yu Zhang, Zhong-Tao Zhao, Shi-Jin Li, Miao-Miao Shi, Tie-Yao Tu","doi":"10.1111/btp.70027","DOIUrl":"https://doi.org/10.1111/btp.70027","url":null,"abstract":"<div>\u0000 \u0000 <p>Pollination is an important ecological process for plant reproduction. Understanding the differences in plant–pollinator interactions and pollinator importance across spatial scales is vital to determine the responses of these interactions to global changes. Continental and oceanic island systems provide us with an ideal model to examine the variation in plant–pollinator interactions. Here, we compared the differences in species composition, plant–pollinator network structure, and pollinator importance in communities between a continental island (Wanshan Island) and an oceanic island (Yongxing Island) in China. The results reveal highly dissimilar species composition between continental and oceanic islands that caused highly different plant–pollinator network structures. In particular, the oceanic island networks had higher network connectance, nestedness, and specialization than the continental island networks. For plants cooccurring on both islands, pollinator species richness and flower visitation rate were higher on the continental island than on the oceanic island. Plant niche overlap was higher on the oceanic island than on the continental island, while pollinator niche overlap was higher on the continental island than on the oceanic island in both the entire network and cooccurring plant species subnetwork. Hymenoptera was the most important pollinator group in the continental island community, while Apidae was the most important in the oceanic island community. The results imply that oceanic island communities may be less vulnerable to disturbance, such as habitat alteration or destruction, than continental island communities and provide implication insights into biodiversity conservation for pollinators on islands.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689415","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

Combining Climber Cutting and Tree Seedling Planting Improves Structural Attributes of a Seasonal Semideciduous Forest in Southeastern Brazil 攀缘植物采伐与树苗种植相结合改善了巴西东南部季节性半落叶森林的结构属性

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-03-22 DOI: 10.1111/btp.70023

Guilherme Aparecido Melo dos Santos, Valéria Forni Martins, Ana Carolina Cardoso de Oliveira, Marina Pérola Zerbinato José, Ricardo Augusto Gorne Viani

{"title":"Combining Climber Cutting and Tree Seedling Planting Improves Structural Attributes of a Seasonal Semideciduous Forest in Southeastern Brazil","authors":"Guilherme Aparecido Melo dos Santos, Valéria Forni Martins, Ana Carolina Cardoso de Oliveira, Marina Pérola Zerbinato José, Ricardo Augusto Gorne Viani","doi":"10.1111/btp.70023","DOIUrl":"https://doi.org/10.1111/btp.70023","url":null,"abstract":"<div>\u0000 \u0000 <p>Management of degraded tropical forest fragments is usually done by cutting climbers (cutting). However, it is still necessary to understand the outcomes of cutting in combination with planting native tree species' seedlings (cutting + planting), especially on the edges of fragments, which are subject to higher disturbance than the forest interior. We tested whether cutting + planting is the restoration strategy that most improves structural attributes of a degraded edge of a tropical seasonal semideciduous forest fragment in southeastern Brazil, relative to cutting and the absence of management (control). Linear mixed models revealed that, after an eight-year period, cutting + planting resulted in the highest decrease in the density and basal area of climbers longer than 1 m, and in the highest increase in the density of large living trees (diameter at breast height, DBH, ≥ 4.8 cm). Although cutting + planting decreased the percentage of large dead trees and increased tree sapling (DBH < 4.8 cm and total height ≥ 50 cm) richness, these variables were more affected by cutting. Management had no effect on the basal area of large living trees and tree sapling density. Because most structural attributes of the degraded edge studied were improved by cutting + planting, we advocate that it is the best strategy tested here for restoring tropical seasonal forests. We hypothesize that seedling planting improves forest conditions and stimulates recruitment, facilitating the regeneration of tree species. Thus, an interesting future avenue is to elucidate the mechanisms by which seedling planting affects regeneration and its long-lasting effects on forest structural attributes.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689326","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

Use of the Alternative Stable States Concept in Tropical Terrestrial Ecosystem Research—A Systematic Literature Review 热带陆地生态系统研究中替代稳定状态概念的使用--系统文献综述

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-03-20 DOI: 10.1111/btp.70025

Stella Mata, João Marcelo Alvarenga Braga, Bernardo M. Flores, Jerônimo Boelsums Barreto Sansevero

{"title":"Use of the Alternative Stable States Concept in Tropical Terrestrial Ecosystem Research—A Systematic Literature Review","authors":"Stella Mata, João Marcelo Alvarenga Braga, Bernardo M. Flores, Jerônimo Boelsums Barreto Sansevero","doi":"10.1111/btp.70025","DOIUrl":"https://doi.org/10.1111/btp.70025","url":null,"abstract":"<div>\u0000 \u0000 <p>Global changes can impact ecosystem resilience, leading to abrupt and irreversible shifts in structure and function. In the face of increasing anthropogenic disturbances, understanding mechanisms that destabilize ecosystems and push them into alternative stable states is crucial. We conducted a systematic review of the application of concepts from dynamic systems theory—alternative stable states, tipping points, hysteresis, and alternative pathways—in tropical terrestrial ecosystem research. We identified 135 articles (71 observational, 59 theoretical/modeling, four experimental, one meta-analysis) using these concepts, addressing ecosystem changes due to anthropogenic and natural disturbances. Most articles focused on conservation biology (46%), followed by climate change (31%), successional ecology (28%), ecological restoration (16%), physiology (15%), novel ecosystems (3%), and biological invasion (3%). Fire was the primary disturbance driving shifts into alternative stable states (54%). Disturbance roles varied across biomes. Numerous articles on tropical and subtropical broadleaf forests highlighted biodiversity and ecosystem service losses due to disturbances. Conversely, studies on tropical and subtropical grasslands, savannas, and shrublands emphasized fires and herbivory as key factors in the maintenance of the structure and composition of savannas. The high number of articles on these biomes underscores their importance. The review highlights that considering alternative stable states in the responses of ecosystems to global changes can enhance disturbance mitigation and ecological restoration, potentially averting future biodiversity and ecosystem service losses. Addressing ecosystem responses to global changes from this perspective can enable more effective disturbance mitigation and ecological restoration actions.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689331","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

Linking Landscape Features, Anthropogenic Stressors, and Mammal Abundance to Unveil Seed Removal Patterns in Tropical Deforested Landscapes 联系景观特征、人为压力源和哺乳动物丰度揭示热带森林砍伐景观中的种子清除模式

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-03-20 DOI: 10.1111/btp.70024

Elaine Rios, José Carlos Morante-Filho, Maíra Benchimol, Kristel De Vleeschouwer, Marcelo Magioli, Ronaldo Gonçalves Morato, Eliana Cazetta

{"title":"Linking Landscape Features, Anthropogenic Stressors, and Mammal Abundance to Unveil Seed Removal Patterns in Tropical Deforested Landscapes","authors":"Elaine Rios, José Carlos Morante-Filho, Maíra Benchimol, Kristel De Vleeschouwer, Marcelo Magioli, Ronaldo Gonçalves Morato, Eliana Cazetta","doi":"10.1111/btp.70024","DOIUrl":"https://doi.org/10.1111/btp.70024","url":null,"abstract":"<div>\u0000 \u0000 <p>Land-use changes and related anthropogenic pressures are responsible for biodiversity declines and threaten the provision of ecosystem services, especially in tropical forests. Seed dispersal and predation, for example, are especially important ecological processes for shaping plant diversity and composition; however, they can be strongly affected by such changes. Understanding factors that limit seed removal and, consequently, the final seed fate in human-modified landscapes is vital to enhancing our knowledge of ecosystem functioning. By using structural equation models, we evaluated the direct and indirect effects of landscape structure, anthropogenic stressors, and the abundance of terrestrial mammals on seed removal patterns of <i>Eschweilera ovata</i> (Lecythidaceae), a common large-seeded species, in 18 Atlantic Forest fragments in southern Bahia, Brazil. We used camera traps to record potential seed-removing mammals and spool line experiments to assess the ultimate fate of the seeds. We reveal a direct effect of patch size on the percentage of seeds removed, with seed removal decreasing in larger forest fragments. Our results also demonstrated a negative effect of human population density on mammal abundance; although a direct effect of mammals on seed removal was not detected. We, therefore, recommend that anthropogenic pressures should be mitigated to enhance the recovery of mammals in fragmented forest landscapes and that further research incorporate other potential predictors to better elucidate the complex patterns of seed removal in tropical forests.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689487","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

Inga and Lianas Are Key Players in the Tropical Nitrogen Cycle of Brazilian Atlantic Forest: Insights From Linking Rates of Nitrogen Fixation With DNA Barcoding Root Identification 莺歌和藤本植物是巴西大西洋森林热带氮循环的关键角色：将固氮率与 DNA 条形码根鉴定联系起来的启示

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-03-20 DOI: 10.1111/btp.70021

J. B. Winbourne, K. E. Hasenstab-Lehman, A. N. Egan, D. Piotto, W. J. Kress, S. Porder

{"title":"Inga and Lianas Are Key Players in the Tropical Nitrogen Cycle of Brazilian Atlantic Forest: Insights From Linking Rates of Nitrogen Fixation With DNA Barcoding Root Identification","authors":"J. B. Winbourne, K. E. Hasenstab-Lehman, A. N. Egan, D. Piotto, W. J. Kress, S. Porder","doi":"10.1111/btp.70021","DOIUrl":"https://doi.org/10.1111/btp.70021","url":null,"abstract":"<div>\u0000 \u0000 <p>Legumes are abundant and diverse in neotropical forests, and many have the potential to fix atmospheric di-nitrogen, playing a unique role in tropical forest nutrient cycling. Despite their recognized importance, it remains difficult to link rates of nitrogen fixation occurring in root nodules belowground to the responsible host plant. To overcome this challenge, we use DNA barcodes of root nodules, upon which rates of nitrogen fixation have been quantified, to determine which legumes are fixing nitrogen, and how much, during forest succession in the Atlantic Forest of Bahia, Brazil. We developed a three-locus DNA barcode (<i>rbcL, trnH-psbA,</i> and <i>matK</i>) library for the legume tree canopy species. We then excavated root nodules, measured rates of nitrogen fixation, and compared DNA barcode sequences of root nodules to this library and published sequences using a community-curated <i>matK</i> phylogenetic framework. We identified a diversity of legume taxa actively fixing nitrogen. The majority of fixation (> 50%) however, was found to be due to the genus <i>Inga</i> in secondary forest stands, and in mature forests, two genera of lianas (woody vines) (<i>Macropsycanthus</i> & <i>Dioclea</i>) represented 70% of the observed nitrogen fixation. <i>Inga</i> had the greatest range of nitrogenase efficiency (nitrogen fixation per unit of nodule biomass). This study illustrates the key role of <i>Inga</i> in the recovery of the nitrogen cycle in secondary regrowth in this region, the sustained inputs of nitrogen in mature forests by lianas, and the utility and challenges of DNA barcoding for linking rates of nitrogen fixation to the responsible host plant.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689322","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

Large Trees Are Most Influential for Long-Term Persistence of Caribbean Pine (Pinus caribaea var. hondurensis) Populations in Lowland Belize Savannas 大树对伯利兹低地热带稀树草原加勒比松（Pinus caribaea var. hondurensis）种群的长期持久性影响最大

IF 1.8 3区环境科学与生态学

Biotropica Pub Date : 2025-03-18 DOI: 10.1111/btp.70019

Jennifer M. Fill, Mario Muschamp, Fanny Tricone, Raelene M. Crandall, Rick Anderson

{"title":"Large Trees Are Most Influential for Long-Term Persistence of Caribbean Pine (Pinus caribaea var. hondurensis) Populations in Lowland Belize Savannas","authors":"Jennifer M. Fill, Mario Muschamp, Fanny Tricone, Raelene M. Crandall, Rick Anderson","doi":"10.1111/btp.70019","DOIUrl":"https://doi.org/10.1111/btp.70019","url":null,"abstract":"<div>\u0000 \u0000 <p>Caribbean pine (<i>Pinus caribaea</i> var. <i>hondurensis</i>) is the dominant canopy tree in lowland savannas of Central America and naturally experiences frequent fire. Previous research showed differential survival of juvenile pines between open, grass-dominated environments and shrub-dominated savanna environments. To date, however, no studies have modeled the population dynamics of natural stands. We studied Caribbean pine population dynamics in coastal Belize to establish a baseline and determine the relative importance of size-based stages and vital rates to population growth. We collected field data on pines from 2017 to 2021 in open and shrubby environments and grouped individuals into three size-based stage classes. We calculated transition probabilities among stages for two 2-year time intervals (2017–2019, 2019–2021) based on growth and survival and on reproduction, adding them to yield a single matrix for each environment and time interval. These transition matrices were then averaged for each environment, and mean matrices were used to calculate the population growth rates (lambda). We compared these population growth rates with those estimated from simulations using mixed modeling of vital rates, where the time interval was modeled as a random effect. We explored elasticity values for each transition in the mean matrices. Lambda was lower in open than in shrubby savanna environments in both analyses. Population growth rates were most sensitive to the growth and survival of pole and large trees in both savanna environments. Although the elasticity of seedling and juvenile trees was relatively low, these stages are naturally important in both environments, especially after major disturbances such as hurricanes.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"57 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143639183","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}

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