G. J. M. Shanika R. Jayasinghe, Pushpakanthie Wijekoon, Tithira Lakkana, C. V. Savitri Gunatilleke, Sisira Ediriweera, Thorsten Wiegand
{"title":"斯里兰卡双龙果林的物种-栖息地关系","authors":"G. J. M. Shanika R. Jayasinghe, Pushpakanthie Wijekoon, Tithira Lakkana, C. V. Savitri Gunatilleke, Sisira Ediriweera, Thorsten Wiegand","doi":"10.1111/jvs.70049","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Questions</h3>\n \n <p>A non-random spatial distribution of species in relation to environmental factors is an important mechanism for maintaining high tree diversity in tropical forests. Niche theory predicts that competing species should use the environment differently. However, we have only limited information on the extent to which environmental dependence and the relative importance of different types of environmental factors vary between species. It is also unclear how the environmental dependence differs according to life stage and species.</p>\n </section>\n \n <section>\n \n <h3> Location</h3>\n \n <p>Here we investigate the environmental variables that determine the spatial distribution of tree species in a 25-ha plot of mixed-dipterocarp tropical rainforest in Sri Lanka.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>We compiled data on the spatial distribution of recruits, saplings, and adults of 57 tree species, as well as topographic and soil variables, and applied methods of spatial point process theory to estimate parametric spatial intensity functions for each life stage of the species as a function of environmental variables.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>Most species distributions were significantly associated with at least one environmental variable, with elevation and the first principal component of soil nutrients being the most important ones. With few exceptions, species showed an intermediate strength of environmental dependence, and we observed a striking similarity in the intraspecific environmental dependence between life stages. Finally, only a few species showed for the same life stage strong positive or negative correlations in their intensity functions, while most species pairs showed only weak or no correlations at all.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>Taking together, our results indicate that the distribution of most of the more abundant species in our forest plot is influenced by local heterogeneity in environmental conditions, and that their environmental preferences lead to a spatial arrangement where competing species use the environment somewhat differently. Overall, our study provides a nuanced understanding of the complex environmental dependencies that shape tropical rainforest ecosystems at local spatial scales.</p>\n </section>\n </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"36 4","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jvs.70049","citationCount":"0","resultStr":"{\"title\":\"Species–Habitat Associations in a Sri Lankan Dipterocarp Forest\",\"authors\":\"G. J. M. Shanika R. Jayasinghe, Pushpakanthie Wijekoon, Tithira Lakkana, C. V. Savitri Gunatilleke, Sisira Ediriweera, Thorsten Wiegand\",\"doi\":\"10.1111/jvs.70049\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n \\n <section>\\n \\n <h3> Questions</h3>\\n \\n <p>A non-random spatial distribution of species in relation to environmental factors is an important mechanism for maintaining high tree diversity in tropical forests. Niche theory predicts that competing species should use the environment differently. However, we have only limited information on the extent to which environmental dependence and the relative importance of different types of environmental factors vary between species. It is also unclear how the environmental dependence differs according to life stage and species.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Location</h3>\\n \\n <p>Here we investigate the environmental variables that determine the spatial distribution of tree species in a 25-ha plot of mixed-dipterocarp tropical rainforest in Sri Lanka.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>We compiled data on the spatial distribution of recruits, saplings, and adults of 57 tree species, as well as topographic and soil variables, and applied methods of spatial point process theory to estimate parametric spatial intensity functions for each life stage of the species as a function of environmental variables.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>Most species distributions were significantly associated with at least one environmental variable, with elevation and the first principal component of soil nutrients being the most important ones. With few exceptions, species showed an intermediate strength of environmental dependence, and we observed a striking similarity in the intraspecific environmental dependence between life stages. Finally, only a few species showed for the same life stage strong positive or negative correlations in their intensity functions, while most species pairs showed only weak or no correlations at all.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusions</h3>\\n \\n <p>Taking together, our results indicate that the distribution of most of the more abundant species in our forest plot is influenced by local heterogeneity in environmental conditions, and that their environmental preferences lead to a spatial arrangement where competing species use the environment somewhat differently. 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Species–Habitat Associations in a Sri Lankan Dipterocarp Forest
Questions
A non-random spatial distribution of species in relation to environmental factors is an important mechanism for maintaining high tree diversity in tropical forests. Niche theory predicts that competing species should use the environment differently. However, we have only limited information on the extent to which environmental dependence and the relative importance of different types of environmental factors vary between species. It is also unclear how the environmental dependence differs according to life stage and species.
Location
Here we investigate the environmental variables that determine the spatial distribution of tree species in a 25-ha plot of mixed-dipterocarp tropical rainforest in Sri Lanka.
Methods
We compiled data on the spatial distribution of recruits, saplings, and adults of 57 tree species, as well as topographic and soil variables, and applied methods of spatial point process theory to estimate parametric spatial intensity functions for each life stage of the species as a function of environmental variables.
Results
Most species distributions were significantly associated with at least one environmental variable, with elevation and the first principal component of soil nutrients being the most important ones. With few exceptions, species showed an intermediate strength of environmental dependence, and we observed a striking similarity in the intraspecific environmental dependence between life stages. Finally, only a few species showed for the same life stage strong positive or negative correlations in their intensity functions, while most species pairs showed only weak or no correlations at all.
Conclusions
Taking together, our results indicate that the distribution of most of the more abundant species in our forest plot is influenced by local heterogeneity in environmental conditions, and that their environmental preferences lead to a spatial arrangement where competing species use the environment somewhat differently. Overall, our study provides a nuanced understanding of the complex environmental dependencies that shape tropical rainforest ecosystems at local spatial scales.
期刊介绍：
The Journal of Vegetation Science publishes papers on all aspects of plant community ecology, with particular emphasis on papers that develop new concepts or methods, test theory, identify general patterns, or that are otherwise likely to interest a broad international readership. Papers may focus on any aspect of vegetation science, e.g. community structure (including community assembly and plant functional types), biodiversity (including species richness and composition), spatial patterns (including plant geography and landscape ecology), temporal changes (including demography, community dynamics and palaeoecology) and processes (including ecophysiology), provided the focus is on increasing our understanding of plant communities. The Journal publishes papers on the ecology of a single species only if it plays a key role in structuring plant communities. Papers that apply ecological concepts, theories and methods to the vegetation management, conservation and restoration, and papers on vegetation survey should be directed to our associate journal, Applied Vegetation Science journal.
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