Transient vegetation dynamics in a tropical coastal wetland: Sea-level rise, glycophyte retreat, and incipient loss in plant diversity

IF 2.2 3区环境科学与生态学 Q2 ECOLOGY

Journal of Vegetation Science Pub Date : 2024-05-21 DOI:10.1111/jvs.13267

Michael S. Ross, Susana L. Stoffella, Pablo L. Ruiz, Suresh C. Subedi, John F. Meeder, Jay P. Sah, Rosario Vidales, Peter R. Minchin, Leonard J. Scinto, Keqi Zhang

{"title":"Transient vegetation dynamics in a tropical coastal wetland: Sea-level rise, glycophyte retreat, and incipient loss in plant diversity","authors":"Michael S. Ross, Susana L. Stoffella, Pablo L. Ruiz, Suresh C. Subedi, John F. Meeder, Jay P. Sah, Rosario Vidales, Peter R. Minchin, Leonard J. Scinto, Keqi Zhang","doi":"10.1111/jvs.13267","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Aim and Questions</h3>\n \n <p>Sea-level rise has been responsible for extensive vegetation changes in coastal areas worldwide. The intent of our study was to analyze vegetation dynamics of a South Florida coastal watershed within an explicit spatiotemporal framework that might aid in projecting the landscape's future response to restoration efforts. We also asked whether recent transgression by mangroves and other halophytes has resulted in reduced plant diversity at local or subregional scales.</p>\n </section>\n \n <section>\n \n <h3> Location</h3>\n \n <p>Florida’'s Southeast Saline Everglades, USA.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>We selected 26 locations, representing a transition zone between sawgrass marsh and mangrove swamp, that was last sampled floristically in 1995. Within this transition zone, leading- and trailing-edge subzones were defined based on plant composition in 1995. Fifty-two site × time combinations were classified and then ordinated to examine vegetation–environment relationships using 2016 environmental data. We calculated alpha-diversity using Hill numbers or Shannon–Weiner index species equivalents and compared these across the two surveys. We used a multiplicative diversity partition to determine beta-diversity from landscape-scale (gamma) diversity in the entire dataset or in each subzone.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>Mangrove and mangrove associates became more important in both subzones: through colonization and establishment in the leading edge, and through population growth combined with the decline of freshwater species in the trailing edge. Alpha-diversity increased significantly in the leading edge and decreased nominally in the trailing edge, while beta-diversity declined slightly in both subzones as well as across the study area.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>Recent halophyte encroachment in the Southeast Saline Everglades continues a trend evident for almost a century. While salinity is an important environmental driver, species’ responses suggest that restoration efforts based on supplementing freshwater delivery will not reverse a trend that depends on multiple interacting factors. Sea-level-rise-driven taxonomic homogenization in coastal wetland communities develops slowly, lagging niche-based changes in community structure and composition.</p>\n </section>\n </div>","PeriodicalId":49965,"journal":{"name":"Journal of Vegetation Science","volume":"35 3","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2024-05-21","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.13267","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}

引用次数: 0

Abstract

Aim and Questions

Sea-level rise has been responsible for extensive vegetation changes in coastal areas worldwide. The intent of our study was to analyze vegetation dynamics of a South Florida coastal watershed within an explicit spatiotemporal framework that might aid in projecting the landscape's future response to restoration efforts. We also asked whether recent transgression by mangroves and other halophytes has resulted in reduced plant diversity at local or subregional scales.

Location

Florida’'s Southeast Saline Everglades, USA.

Methods

We selected 26 locations, representing a transition zone between sawgrass marsh and mangrove swamp, that was last sampled floristically in 1995. Within this transition zone, leading- and trailing-edge subzones were defined based on plant composition in 1995. Fifty-two site × time combinations were classified and then ordinated to examine vegetation–environment relationships using 2016 environmental data. We calculated alpha-diversity using Hill numbers or Shannon–Weiner index species equivalents and compared these across the two surveys. We used a multiplicative diversity partition to determine beta-diversity from landscape-scale (gamma) diversity in the entire dataset or in each subzone.

Results

Mangrove and mangrove associates became more important in both subzones: through colonization and establishment in the leading edge, and through population growth combined with the decline of freshwater species in the trailing edge. Alpha-diversity increased significantly in the leading edge and decreased nominally in the trailing edge, while beta-diversity declined slightly in both subzones as well as across the study area.

Conclusions

Recent halophyte encroachment in the Southeast Saline Everglades continues a trend evident for almost a century. While salinity is an important environmental driver, species’ responses suggest that restoration efforts based on supplementing freshwater delivery will not reverse a trend that depends on multiple interacting factors. Sea-level-rise-driven taxonomic homogenization in coastal wetland communities develops slowly, lagging niche-based changes in community structure and composition.

Abstract Image

查看原文本刊更多论文

热带沿海湿地的瞬时植被动态：海平面上升、糖叶植物退缩和植物多样性的初步丧失

目的和问题海平面上升导致了全球沿海地区植被的广泛变化。我们研究的目的是在一个明确的时空框架内分析南佛罗里达沿海流域的植被动态，以帮助预测景观未来对恢复工作的反应。我们还提出了一个问题，即红树林和其他盐生植物最近的侵蚀是否导致了当地或次区域范围内植物多样性的减少。地点美国佛罗里达州东南部盐碱沼泽地。方法我们选择了代表锯草沼泽和红树林沼泽之间过渡区的 26 个地点，该过渡区的上一次植物采样是在 1995 年。在该过渡区内，根据 1995 年的植物组成定义了前缘亚区和后缘亚区。我们对 52 个地点 × 时间组合进行了分类，然后利用 2016 年的环境数据进行排序，以研究植被与环境之间的关系。我们使用希尔数或香农-韦纳指数物种当量计算阿尔法多样性，并在两次调查中进行比较。我们使用乘法多样性分区来确定整个数据集或每个子区的景观尺度（伽马）多样性的贝塔多样性。结果红树林及红树林伴生物在两个亚区都变得更加重要：在前缘通过殖民和建立，在后缘通过种群增长加上淡水物种的减少。阿尔法多样性在前缘显著增加，而在后缘名义上有所减少，而贝塔多样性在两个亚区以及整个研究区域都略有下降。结论大沼泽东南部盐碱地最近出现的盐生植物蚕食现象延续了近一个世纪以来的明显趋势。虽然盐度是一个重要的环境驱动因素，但物种的反应表明，以补充淡水供应为基础的恢复工作并不能扭转这一取决于多种相互作用因素的趋势。海平面上升驱动的沿岸湿地群落分类同质化发展缓慢，滞后于群落结构和组成中基于生态位的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Vegetation Science 环境科学-林学

CiteScore

6.00

自引率

3.60%

发文量

审稿时长

2 months

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.