کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5742353 1617655 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Original Research ArticleStructural breakdown of specialized plant-herbivore interaction networks in tropical forest edges
ترجمه فارسی عنوان
تجزیه ساختاری شبکه های متقابل گیاهان و گیاهان تخصصی در لبه های جنگل گرمسیری
کلمات کلیدی
اثرات لبه، گیاهخواری، اختلال در انسان، تکه تکه شدن جنگل، مدولاسیون شبکه،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی

Plant-herbivore relationships are essential for ecosystem functioning, typically forming an ecological network with a compartmentalized (i.e. modular) structure characterized by highly specialized interactions. Human disturbances can favor habitat generalist species and thus cause the collapse of this modular structure, but its effects are rarely assessed using a network-based approach. We investigate how edge proximity alters plant-insect herbivore networks by comparing forest edge and interior in a large remnant (3.500 ha) of the Brazilian Atlantic forest. Given the typical dominance of pioneer plants and generalist herbivores in edge-affected habitats, we test the hypothesis that the specialized structure of plant-herbivore networks collapse in forest edges, resulting in lower modularity and herbivore specialization. Despite no differences in the number of species and interactions, the network structure presented marked differences between forest edges and interior. Herbivore specialization, modularity and number of modules were significantly higher in forest interior than edge-affected habitats. When compared to a random null model, two (22.2%) and eight (88.8%) networks were significantly modular in forest edge and interior, respectively. The loss of specificity and modularity in plant-herbivore networks in forest edges may be related to the loss of important functions, such as density-dependent control of superior plant competitors, which is ultimately responsible for the maintenance of biodiversity and ecosystem functions. Our results support previous warnings that focusing on traditional community measures only (e.g. species diversity) may overlook important modifications in species interactions and ecosystem functioning.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Global Ecology and Conservation - Volume 12, October 2017, Pages 1-8
نویسندگان
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