التفاصيل البيبلوغرافية
| العنوان: |
Data from: Indirect effects of predators control herbivore richness and abundance in a benthic eelgrass (Zostera marina) mesograzer community ... |
| المؤلفون: |
Amundrud, Sarah L., Srivastava, Diane S., O'Connor, Mary I. |
| بيانات النشر: |
Dryad |
| سنة النشر: |
2016 |
| المجموعة: |
DataCite Metadata Store (German National Library of Science and Technology) |
| مصطلحات موضوعية: |
Pontogeneia rostrata, competitive exclusion, top down, Idotea resecata, prey, predator mediated coexistence, Monocorophium acherusicum, Caprella sp., Aoroides columbiae, Alvania sp., Marine, Zostera marina, current, Lacuna vincta, bottom up, Photis brevipes |
| الوصف: |
1. Herbivore communities can be sensitive to changes in predator pressure (top-down effects) and resource availability (bottom-up effects) in a wide range of systems. However, it remains unclear whether such top-down and bottom-up effects reflect direct impacts of predators and/or resources on herbivores, or are indirect, reflecting altered interactions among herbivore species. 2. We quantified direct and indirect effects of bottom-up and top-down processes on an eelgrass (Zostera marina) herbivore assemblage. In a field experiment, we factorially manipulated water column nutrients (with Osmocote™ slow-release fertilizer) and predation pressure (with predator exclusion cages) and measured the effects on herbivore abundance, richness and beta diversity. We examined likely mechanisms of community responses by statistically exploring the response of individual herbivore species to trophic manipulations. 3. Predators increased herbivore richness and total abundance, in both cases through indirect shifts in ... : Abundances of individual eelgrass mesograzer species on Artificial Seagrass Units (ASUs)To examine the relative importance of bottom-up and top-down control of the eelgrass (Zostera marina) mesograzer community, nutrients (2 levels) and predators (3 levels) were manipulated in a full factorial experimental design (n = 10 replicates per treatment combination) for seven weeks (June 17 – July 28, 2011). 60 artificial seagrass units (ASUs) were randomly arranged in three rows, parallel to the shore in the subtidal Z. marina zone, and distributed such that ASUs were separated by 3 m within and between rows. ASUs were made of frayed rope (length = 35 cm) to mimic seagrass or branching algal habitat, and were used to sample mesograzers on a standard surface area. This data file gives the abundances of the eight mesograzers on ASUs for each treatment. Cage.Trt: the predator exclusion cage treatment (full = full cage/predator exclusion; partial = partial cage/predators have access/cage control; none = no ... |
| نوع الوثيقة: |
dataset |
| اللغة: |
English |
| Relation: |
https://dx.doi.org/10.1111/1365-2656.12350 |
| DOI: |
10.5061/dryad.58p0t |
| الاتاحة: |
https://dx.doi.org/10.5061/dryad.58p0t
https://datadryad.org/stash/dataset/doi:10.5061/dryad.58p0t |
| Rights: |
Creative Commons Zero v1.0 Universal ; https://creativecommons.org/publicdomain/zero/1.0/legalcode ; cc0-1.0 |
| رقم الانضمام: |
edsbas.6BBB932C |
| قاعدة البيانات: |
BASE |