期刊
ICES JOURNAL OF MARINE SCIENCE
卷 69, 期 3, 页码 370-379出版社
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsr182
关键词
allometry; Arrhenius; Calanus; copepod; diversity; Holling II; life-cycle strategy; numerical modelling; physiological rates; Pseudocalanus
资金
- US National Science Foundation [OCE-0962074]
- Directorate For Geosciences
- Division Of Ocean Sciences [0962074] Funding Source: National Science Foundation
Predicting ecological changes under climate change requires mechanistic descriptions of the impact of environmental conditions on the physiology, life history, and population dynamics of target species. A generic framework has been developed to simulate the growth and development of copepods, a critical link in pelagic ecosystems that connects environmental variability and changes in primary production with higher trophic levels. The modelled copepods, referred to as compupods, are described by their body mass and developmental stage. The dynamics of the compupods are determined by three core equations: universal temperature-dependence, Holling's type II ingestion, and allometric scaling. This general framework was applied to four copepod taxa: Pseudocalanus newmani, Calanus finmarchicus, C. glacialis, and C. hyperboreus, spanning a wide range of body sizes. A genetic algorithm procedure was used to estimate the unknown parameters required to produce a good fit to observed species-specific growth and development data. The performance of the model was evaluated by comparing the influence of food and temperature on ingestion, gut clearance, and egg production rates with published relationships. Simulations of the four species suggest that small changes in the trade-off between growth and development are responsible for the interspecific diversity observed.
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