Maira Soares de Lima, Luis López-Mársico, Micaela Abrigo, Anaclara Guido
{"title":"水分胁迫是否影响亚湿润温带草原的群落入侵性？","authors":"Maira Soares de Lima, Luis López-Mársico, Micaela Abrigo, Anaclara Guido","doi":"10.1111/jvs.70067","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Aim</h3>\n \n <p>Under climate change scenarios, droughts are expected to become more frequent and severe in some regions, influencing the likelihood of successful biological invasion in ecosystems. We evaluate the effect of water stress on the invasibility of different Uruguayan grassland communities, focusing on the potential invasion of <i>Eragrostis plana</i>.</p>\n </section>\n \n <section>\n \n <h3> Location</h3>\n \n <p>Eastern Uruguay grasslands, <i>Campos</i> of Río de la Plata grasslands.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>Monoliths from three grassland communities (sparsely, densely, and tall densely vegetated communities), which differ in soil characteristics and species diversity, were collected in the field. These monoliths were transported to a growth chamber, where they were subjected to a water stress experiment consisting of two treatments: with and without water stress. Water stress involved the suspension of irrigation for 20 days. Subsequently, each monolith was sown with seeds of <i>E. plana</i>. Community characteristics and seedling emergence were assessed. Seedling emergence and survival of <i>E. plana</i> were compared across water stress treatments and communities, and relationships with functional groups cover, standing dead biomass, bare soil, and species richness were analyzed.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>Differences in <i>E. plana</i> germination and survival were primarily associated with grassland community type rather than the effect of water stress. The sparsely vegetated community exhibited the highest levels of invasion, regardless of water stress, compared with densely and tall densely vegetated communities. The invasion of <i>E. plana</i> was negatively associated with the cover of erect grasses (its own functional group) and with species richness, both variables that decreased with water stress.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>The germination of <i>E. plana</i> was mainly limited by biotic factors that varied among grassland communities, particularly the cover of erect grasses and species richness, both of which can decline under water stress. Management of <i>E. plana</i> should consider the heterogeneity of grassland communities in eastern Uruguay, especially the high invasibility of the sparsely vegetated community.</p>\n </section>\n </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"36 5","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Does Water Stress Affect Community Invasibility in a SubHumid Temperate Grassland?\",\"authors\":\"Maira Soares de Lima, Luis López-Mársico, Micaela Abrigo, Anaclara Guido\",\"doi\":\"10.1111/jvs.70067\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n \\n <section>\\n \\n <h3> Aim</h3>\\n \\n <p>Under climate change scenarios, droughts are expected to become more frequent and severe in some regions, influencing the likelihood of successful biological invasion in ecosystems. We evaluate the effect of water stress on the invasibility of different Uruguayan grassland communities, focusing on the potential invasion of <i>Eragrostis plana</i>.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Location</h3>\\n \\n <p>Eastern Uruguay grasslands, <i>Campos</i> of Río de la Plata grasslands.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>Monoliths from three grassland communities (sparsely, densely, and tall densely vegetated communities), which differ in soil characteristics and species diversity, were collected in the field. These monoliths were transported to a growth chamber, where they were subjected to a water stress experiment consisting of two treatments: with and without water stress. Water stress involved the suspension of irrigation for 20 days. Subsequently, each monolith was sown with seeds of <i>E. plana</i>. Community characteristics and seedling emergence were assessed. Seedling emergence and survival of <i>E. plana</i> were compared across water stress treatments and communities, and relationships with functional groups cover, standing dead biomass, bare soil, and species richness were analyzed.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>Differences in <i>E. plana</i> germination and survival were primarily associated with grassland community type rather than the effect of water stress. The sparsely vegetated community exhibited the highest levels of invasion, regardless of water stress, compared with densely and tall densely vegetated communities. The invasion of <i>E. plana</i> was negatively associated with the cover of erect grasses (its own functional group) and with species richness, both variables that decreased with water stress.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusions</h3>\\n \\n <p>The germination of <i>E. plana</i> was mainly limited by biotic factors that varied among grassland communities, particularly the cover of erect grasses and species richness, both of which can decline under water stress. Management of <i>E. plana</i> should consider the heterogeneity of grassland communities in eastern Uruguay, especially the high invasibility of the sparsely vegetated community.</p>\\n </section>\\n </div>\",\"PeriodicalId\":49965,\"journal\":{\"name\":\"Journal of Vegetation Science\",\"volume\":\"36 5\",\"pages\":\"\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2025-09-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Vegetation Science\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jvs.70067\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Vegetation Science","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jvs.70067","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}
Does Water Stress Affect Community Invasibility in a SubHumid Temperate Grassland?
Aim
Under climate change scenarios, droughts are expected to become more frequent and severe in some regions, influencing the likelihood of successful biological invasion in ecosystems. We evaluate the effect of water stress on the invasibility of different Uruguayan grassland communities, focusing on the potential invasion of Eragrostis plana.
Location
Eastern Uruguay grasslands, Campos of Río de la Plata grasslands.
Methods
Monoliths from three grassland communities (sparsely, densely, and tall densely vegetated communities), which differ in soil characteristics and species diversity, were collected in the field. These monoliths were transported to a growth chamber, where they were subjected to a water stress experiment consisting of two treatments: with and without water stress. Water stress involved the suspension of irrigation for 20 days. Subsequently, each monolith was sown with seeds of E. plana. Community characteristics and seedling emergence were assessed. Seedling emergence and survival of E. plana were compared across water stress treatments and communities, and relationships with functional groups cover, standing dead biomass, bare soil, and species richness were analyzed.
Results
Differences in E. plana germination and survival were primarily associated with grassland community type rather than the effect of water stress. The sparsely vegetated community exhibited the highest levels of invasion, regardless of water stress, compared with densely and tall densely vegetated communities. The invasion of E. plana was negatively associated with the cover of erect grasses (its own functional group) and with species richness, both variables that decreased with water stress.
Conclusions
The germination of E. plana was mainly limited by biotic factors that varied among grassland communities, particularly the cover of erect grasses and species richness, both of which can decline under water stress. Management of E. plana should consider the heterogeneity of grassland communities in eastern Uruguay, especially the high invasibility of the sparsely vegetated community.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
