Island biogeography in urban landscapes: small island effect and nestedness in bryophyte communities of urban parks in Shanghai, China

被引：0

作者：

Fumin Lei ^{[1
]}

Yiyi Shan ^{[1
]}

Dandan Li ^{[1
]}

Xiangzhang Wu ^{[1
]}

Jun Yang ^{[1
]}

Shuiliang Guo ^{[1
]}

Jing Yu ^{[2
]}

机构：

[1] Shanghai Normal University. No,College of Life Sciences

[2] Shanghai Normal University,College of Life Sciences

[3] and Yangtze River Delta Urban Wetland Ecosystem National Field Scientific Observation and Research Station,undefined

来源：

Urban Ecosystems | 2025年 / 28卷 / 4期

关键词：

Urbanization; Shanghai; Habitat fragmentation; Small-island effect; Nestedness; Bryophyte;

D O I：

10.1007/s11252-025-01741-3

中图分类号：

学科分类号：

摘要：

Urban habitat fragmentation poses critical challenges for biodiversity conservation. This study investigates two key biogeographic patterns – the small island effect (SIE) and nestedness – in bryophyte communities across 32 urban parks in Shanghai, China. Using multi-model inference and piecewise regression analysis with the Akaike Information Criterion (AICc), we identified SIE thresholds: 0.075 km2 for total bryophytes, 0.0693 km2 for mosses, 0.0686 km2 for acrocarpous mosses, and 0.0829 km2 for pleurocarpous mosses, while liverworts showed no threshold. Key drivers of SIE include stochastic disturbances, habitat diversity, and nutrient subsidies from precipitation. Nestedness analysis (NODF index) revealed strong area-dependency, with larger parks harboring richer communities. We propose prioritizing large parks as biodiversity reservoirs while implementing targeted conservation for small parks containing unique species. This work establishes an island biogeography-informed framework for urban bryophyte conservation.

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