Does ecosystem variability explain phytoplankton diversity? Solving an ecological puzzle with long-term data sets


Contact
subrata.sarker [ at ] awi.de

Abstract

Explaining species diversity as a function of ecosystem variability is a long-term discussion in community-ecology research. Here, we aimed to establish a causal relationship between ecosystem variability and phytoplankton diversity in a shallow-sea ecosystem. We used long-term data on biotic and abiotic factors from Helgoland Roads, along with climate data to assess the effect of ecosystem variability on phytoplankton diversity. A point cumulative semi-variogram method was used to estimate the long-term ecosystem variability. A Markov chain model was used to estimate dynamical processes of species i.e. occurrence, absence and outcompete probability. We identified that the 1980s was a period of high ecosystem variability while the last two decades were comparatively less variable. Ecosystem variability was found as an important predictor of phytoplankton diversity at Helgoland Roads. High diversity was related to low ecosystem variability due to non-significant relationship between probability of a species occurrence and absence, significant negative relationship between probability of a species occurrence and probability of a species to be outcompeted by others, and high species occurrence at low ecosystem variability. Using an exceptional marine long-term data set, this study established a causal relationship between ecosystem variability and phytoplankton diversity.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Research Networks
Peer revision
Peer-reviewed
Publication Status
Published
Eprint ID
48372
DOI 10.1016/j.seares.2018.02.002

Cite as
Sarker, S. , Lemke, P. and Wiltshire, K. H. (2018): Does ecosystem variability explain phytoplankton diversity? Solving an ecological puzzle with long-term data sets , Journal of Sea Research, 135 , pp. 11-17 . doi: 10.1016/j.seares.2018.02.002


Download
[img]
Preview
PDF
JSRES_Diversity.pdf

Download (3MB) | Preview

Share


Citation

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item