The impact of habitat fragmentation on domatia-dwelling mites and a mite-plant-fungus tritrophic interaction
The impact of habitat fragmentation on domatia-dwelling mites and a mite-plant-fungus tritrophic interaction
复制标题
栖息地破碎化对居住螨的影响以及螨-植物-真菌三营养相互作用
DOI：
10.1007/s10980-022-01529-2
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发表时间：
2022
影响因子：
5.2
通讯作者：
Brudvig, Lars A.
中科院分区：
文献类型：
--
作者：
Graham, Carolyn D. K.;Warneke, Christopher R.;Weber, Marjorie;Brudvig, Lars A.
环境破碎化是生物多样性的主要威胁，但破碎化对大多数分类群的影响，更不用说这些分类群之间的相互作用，在很大程度上仍然是未知的。目的通过大规模生境破碎化实验，研究破碎化对植物-生境螨群落和螨-植物-真菌相互作用的影响，包括斑块连通性降低、斑块形状改变和边缘邻近性。方法在不同边缘面积比（形状）和廊道连通性的碎片中，对黑栎（一种具有叶domatia的植物）叶片近边缘和远边缘的螨群落进行取样。我们还进行了螨虫排除实验，以测试螨虫存在和真菌菌丝丰度对叶片表面的影响。结果生境边缘影响叶栖螨的丰度和丰富度；靠近边缘的植物有较高的螨丰度和物种丰富度。同样，靠近斑块边缘的叶片菌丝计数较高。尽管斑块边缘的螨和真菌丰度较高，但这些叶片上的菌丝计数不受螨丰度的影响。斑块形状和连通性不影响螨的丰度、螨种丰富度，也不影响螨对叶片表面真菌丰度的影响。结论螨类和叶面真菌可能分别受到温度等边缘结构环境梯度的影响，而非营养效应。我们证明，即使在没有级联营养效应的情况下，大规模的栖息地破碎化，特别是边缘效应，也会对微观群落的多个层面产生影响。
ContextHabitat fragmentation is a leading threat to biodiversity, yet the impacts of fragmentation on most taxa, let alone interactions among those taxa, remain largely unknown.ObjectivesWe studied how three consequences of fragmentation—reduced patch connectivity, altered patch shape, and edge proximity—impact plant-dwelling mite communities and mite-plant-fungus interactions within a large-scale habitat fragmentation experiment.MethodsWe sampled mite communities from the leaves ofQuercus nigra(a plant species that has foliar domatia which harbor fungivorous and predacious mites) near and far from edge within fragments of varying edge-to-area ratio (shape) and connectivity via corridors. We also performed a mite-exclusion experiment across these fragmentation treatments to test the effects of mite presence and fungal hyphal abundance on leaf surfaces.ResultsHabitat edges influenced the abundance and richness of leaf-dwelling mites; plants closer to the edge had higher mite abundance and species richness. Likewise, hyphal counts were higher on leaves near patch edges. Despite both mite and fungal abundance being higher at patch edges, leaf hyphal counts were not impacted by mite abundance on those leaves. Neither patch shape nor connectivity influenced mite abundance, mite species richness, or the influence of mites on leaf surface fungal abundance.ConclusionOur results suggest that mites and foliar fungi may be independently affected by edge-structured environmental gradients, like temperature, rather than trophic effects. We demonstrate that large-scale habitat fragmentation and particularly edge effects can have impacts on multiple levels of microscopic communities, even in the absence of cascading trophic effects.
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影响因子：
13.6
作者：
Haddad NM;Brudvig LA;Clobert J;Davies KF;Gonzalez A;Holt RD;Lovejoy TE;Sexton JO;Austin MP;Collins CD;Cook WM;Damschen EI;Ewers RM;Foster BL;Jenkins CN;King AJ;Laurance WF;Levey DJ;Margules CR;Melbourne BA;Nicholls AO;Orrock JL;Song DX;Townshend JR
通讯作者：
Townshend JR
影响因子：
3.4
作者：
Fischer, J;Lindenmayer, DB
通讯作者：
Lindenmayer, DB
森林边缘的功能定位：多种物理因素的梯度
影响因子：
2.2
作者：
M. Cadenasso;M. Traynor;S. Pickett
通讯作者：
S. Pickett
影响因子：
56.9
作者：
Gonzalez, A;Lawton, JH;Evans-Freke, I
通讯作者：
Evans-Freke, I
影响因子：
5.9
作者：
Fletcher, Robert J., Jr.;Didham, Raphael K.;Haddad, Nick M.
通讯作者：
Haddad, Nick M.