Land-use change alters specialist bee diet and drives body size declines

IF 4 2区 环境科学与生态学 Q1 ECOLOGY Landscape Ecology Pub Date : 2024-06-03 DOI:10.1007/s10980-024-01893-1
Sarah E. Anderson, Philip Hahn, Gabriela Gonzalez, Rachel E. Mallinger
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Abstract

Context

Land-use change can cause decreases in plant abundance and richness and the replacement of wild plants with domesticated plants. Changes in plant community composition disrupt mutualistic plant-pollinator interactions with ecological consequences for plants and pollinators, and especially for specialists that rely on certain plants.

Objectives

We assessed the effects of land-use change and subsequent shifts in plant communities on resource collection and body size for a bee pollinator, Habropoda laboriosa, a purported specialist of blueberries and related Ericaceae plants.

Methods

We collected Habropoda laboriosa across a gradient of land use in north-central Florida including agricultural, natural, and urban habitats. We assessed landcover and floral community composition at each site and related these to bee body size (intertegular distance) and resource use (proportion host plant pollen and pollen diversity collected).

Results

Host plant pollen collection and bee body size generally responded similarly to the landscape, both increasing with habitats containing host plants (blueberry farms and natural habitat) but decreasing with urban development. However, host pollen collection and bee body size responded in opposite ways to overall cropland in the landscape, with cropland negatively affecting body size despite positively affecting host pollen collection, indicating other factors associated with cropland might drive declines in bee body size.

Conclusions

Land-use change can adversely affect bee diet and body size, and changes in diet likely contribute to changes in body size over time. Specialists are particularly at risk for negative impacts of land-use change due to their inability to shift plant hosts.

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土地使用的变化改变了特种蜂的食性,并导致体型缩小
背景土地利用的变化会导致植物丰度和丰富度的下降,并以驯化植物取代野生植物。我们评估了土地利用变化和植物群落随之变化对蜜蜂授粉者 Habropoda laboriosa 的资源采集和体型的影响,蜜蜂授粉者 Habropoda laboriosa 据称是蓝莓和相关 Ericaceae 植物的专家。结果寄主植物花粉采集量和蜜蜂体型对地貌的反应大致相同,都随着含有寄主植物的栖息地(蓝莓农场和自然栖息地)的增加而增加,但随着城市的发展而减少。然而,寄主植物花粉采集量和蜜蜂体型对景观中总体耕地的反应却相反,尽管耕地对寄主植物花粉采集量有积极影响,但对蜜蜂体型却有消极影响,这表明与耕地相关的其他因素可能会导致蜜蜂体型下降。特种蜂由于无法转移植物寄主,因此特别容易受到土地利用变化的负面影响。
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来源期刊
Landscape Ecology
Landscape Ecology 环境科学-地球科学综合
CiteScore
8.30
自引率
7.70%
发文量
164
审稿时长
8-16 weeks
期刊介绍: Landscape Ecology is the flagship journal of a well-established and rapidly developing interdisciplinary science that focuses explicitly on the ecological understanding of spatial heterogeneity. Landscape Ecology draws together expertise from both biophysical and socioeconomic sciences to explore basic and applied research questions concerning the ecology, conservation, management, design/planning, and sustainability of landscapes as coupled human-environment systems. Landscape ecology studies are characterized by spatially explicit methods in which spatial attributes and arrangements of landscape elements are directly analyzed and related to ecological processes.
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