NDLI: Spillover of Secondary Foundation Species Transforms Community Structure and Accelerates Decomposition in Oak Savannas

Content Provider	Springer Nature Link
Author	Angelini, Christine Briggs, Kristin Lauren
Copyright Year	2015
Abstract	Secondary foundation species facilitate biodiversity by providing complex habitat within the protective structures of many primary foundation species; whether they retain this role when they are dispersed in novel environments is unclear. Here, we explore how secondary foundation species’ density within hosts controls the rate at which individuals accrue and test if dislodged secondary foundation species then bolster the abundance and diversity of associated species and decomposition in a widespread system: southern live oaks, Quercus virginiana, hosting festoons of the bromeliad, Tillandsia usneoides, in southeastern US savannas. One year of monitoring showed that as Tillandsia density within oaks increases, Tillandsia deposition beneath oaks increases linearly in kind. Once on the ground, two manipulative experiments revealed that: on small scales, individual festoons retain moisture, reduce temperature, and facilitate invertebrates and fungi which combine to accelerate litter decomposition and, on larger scales, continual deposition of festoons dramatically reduces grass cover and increases litter layer depth, invertebrate and fungi richness and density, and decomposition. Surveys further suggest that Tillandsia populations within oaks, in moderating festoon accumulation, are shaping understory communities throughout this geographic region. Thus, disturbance-induced spillover enables secondary foundation species to define biodiversity and ecosystem functioning beyond the boundaries of their hosts.
Starting Page	780
Ending Page	791
Page Count	12
File Format	PDF
ISSN	14329840
Journal	Ecosystems
Volume Number	18
Issue Number	5
e-ISSN	14350629
Language	English
Publisher	Springer US
Publisher Date	2015-03-17
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	biodiversity decomposition ecosystem function facilitation fungi invertebrate litter layer Tillandsia usneoides Ecology Plant Sciences Zoology Environmental Management Geoecology/Natural Processes Hydrology/Water Resources
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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