How does the taxonomic and functional structure of plant communities differ between riverine and palustrine swamps?

IF 2.2 3区环境科学与生态学 Q2 ECOLOGY

Journal of Vegetation Science Pub Date : 2024-11-18 DOI:10.1111/jvs.13319

Philippe Janssen, Laurie Bisson-Gauthier, Eduardo González-Sargas, Audréanne Loiselle, Marcel Darveau, Bérenger Bourgeois, Monique Poulin

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引用次数: 0

Abstract

Questions

How does the type of swamp, that is, riverine vs palustrine, shape understorey and overstorey plant communities? Beyond swamp type, how do spatial, topographic, soil and landscape characteristics determine the taxonomic and functional structure of swamp communities?

Location

Southern Québec, Canada.

Methods

We sampled riverine and palustrine swamp plant communities in two watersheds within two ecoregions with contrasting land use. At the site scale (n = 56), we analyzed differences between riverine and palustrine swamps in plant richness and cover, species composition, and mean and dispersion values for ecological and morphological traits. At the plot scale (n = 213), we assessed the relative influence of a set of environmental parameters on species richness and cover, as well as on trait values using mixed models and on species composition using redundancy analysis.

Results

Species composition and the mean value of traits varied significantly between the two types of swamps. While riverine swamps hosted more non-native species and were composed of more mesophilic species, shorter in height and with dominant resource acquisition strategies, palustrine swamps sheltered more non-vascular taxa and tall hygrophilous vascular species with more conservative resource strategies. The surrounding landscape and local microtopography within swamps had a significant effect on plant community structure. Species diversity and trait dispersion increased from agricultural-dominated to forest-dominated landscapes, and from homogeneous to heterogeneous substrates.

Conclusions

Habitats provided by riverine and palustrine swamps are complementary for wetland biodiversity. Our results underline the need to develop conservation plans to protect a wide variety of freshwater swamp types; for example, management actions that maintain or promote heterogeneous topographic forms at the site scale, and continuity of forest cover at the landscape scale.

Abstract Image

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沿河沼泽和滨河沼泽的植物群落分类和功能结构有何不同？

问题沼泽的类型，即沿河沼泽与沿岸沼泽，如何影响林下和林上植物群落？除了沼泽类型，空间、地形、土壤和景观特征如何决定沼泽群落的分类和功能结构？地点加拿大魁北克南部。方法我们在两个生态区域内的两个流域采集了河边和原生沼泽植物群落的样本，这两个流域的土地利用情况截然不同。在地点尺度上（n = 56），我们分析了河流沼泽和湖泊沼泽在植物丰富度和覆盖度、物种组成以及生态和形态特征的平均值和离散值方面的差异。在小区尺度上（n = 213），我们使用混合模型评估了一组环境参数对物种丰富度和覆盖度以及性状值的相对影响，并使用冗余分析评估了物种组成的相对影响。结果两类沼泽的物种组成和性状平均值差异很大。河岸沼泽栖息着更多的非本地物种，由更多的中亲水性物种组成，高度较矮，资源获取策略占主导地位；而沼泽则栖息着更多的非维管束类群和高大的滋湿维管束物种，资源获取策略较为保守。沼泽内的周围景观和局部微地形对植物群落结构有显著影响。从以农业为主的景观到以森林为主的景观，从同质基质到异质基质，物种多样性和性状分散性都有所增加。结论河流沼泽和湖沼提供的生境对湿地生物多样性具有互补性。我们的研究结果表明，有必要制定保护计划来保护各种淡水沼泽类型；例如，在地点尺度上采取管理行动来保持或促进异质地形，在景观尺度上保持森林植被的连续性。

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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.