NDLI: Seasonal variation in top-down and bottom-up processes in a grassland arthropod community

Content Provider	Springer Nature Link
Author	Boyer, Alison G. Swearingen, Robert E. Blaha, Margo A. Fortson, Christopher T. Gremillion, Sara K. Osborn, Kelly A. Moran, Matthew D.
Copyright Year	2003
Abstract	Both top-down and bottom-up processes are common in terrestrial ecosystems, but how these opposing forces interact and vary over time is poorly understood. We tested the variation of these processes over seasonal time in a natural temperate zone grassland, a field site characterized by strong seasonal changes in abiotic and biotic conditions. Separate factorial experiments manipulating nutrients and cursorial spiders were performed in the wet and dry seasons. We also performed a water-addition experiment during the summer (dry season) to determine the degree of water limitation during this time. In the spring, nutrient addition increased plant growth and carnivore abundance, indicating a bottom-up control process. Among herbivores, sap-feeders were significantly enhanced while grazers significantly declined resulting in no net change in herbivore abundance. In the summer, water limitation was predominant increasing plants and all herbivores while nutrient (N) effects were non-significant. Top-down processes were present only in the spring season and only impacted the guild of grazing herbivores. These results show that bottom-up limitation is present throughout the season in this grassland, although the specific limiting resource changes as the season progresses. Bottom-up processes affected all trophic levels and many different guilds, while top-down effects were limited to a select group of herbivores and did not extend to the plant trophic level. Our results show that the relative strengths of top-down and bottom-up processes can shift over relatively short periods of time in habitats with a strong seasonal component.
Starting Page	309
Ending Page	316
Page Count	8
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	136
Issue Number	2
e-ISSN	14321939
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-05-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Top-down Bottom-up Grassland Trophic structure Seasonal variation
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Top-down and bottom-up processes in grassland and forested streams

Seasonal shift from bottom-up to top-down impact in phytophagous insect populations

Ecosystem-level evidence for top-down and bottom-up control of production in a grassland stream system

Relative strengths of top-down and bottom-up forces in a tropical forest community

Bottom-up and top-down regulation of decomposition in a tropical forest

Using successional theory to measure marine ecosystem health

Intraspecific differences in plant chemotype determine the structure of arthropod food webs

Climate Change, Nutrition, and Bottom-Up and Top-Down Food Web Processes.

Effects of an invasive plant transcend ecosystem boundaries through a dragonfly-mediated trophic pathway

Seasonal variation in top-down and bottom-up processes in a grassland arthropod community

Similar Documents

Top-down and bottom-up processes in grassland and forested streams

Seasonal shift from bottom-up to top-down impact in phytophagous insect populations

Ecosystem-level evidence for top-down and bottom-up control of production in a grassland stream system

Relative strengths of top-down and bottom-up forces in a tropical forest community

Bottom-up and top-down regulation of decomposition in a tropical forest

Using successional theory to measure marine ecosystem health

Intraspecific differences in plant chemotype determine the structure of arthropod food webs

Climate Change, Nutrition, and Bottom-Up and Top-Down Food Web Processes.

Effects of an invasive plant transcend ecosystem boundaries through a dragonfly-mediated trophic pathway

Seasonal variation in top-down and bottom-up processes in a grassland arthropod community