کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6386987 | 1627290 | 2014 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chaotic dynamics in a simple dynamical green ocean plankton model
ترجمه فارسی عنوان
پویایی هرج و مرج در یک مدل ساده پلانکتون اقیانوس سبز دینامیک
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کلمات کلیدی
آشوب، جاذبه سبک، مدل اقیانوس سبز پویا مدل پلانکتون،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
چکیده انگلیسی
We consider a relatively simple (four-population) DGOM of phytoplankton, zooplankton, bacteria and zooflagellates where the interacting plankton populations are connected by a single limiting nutrient. Chaotic solutions are possible in this 4-dimensional model for plankton population dynamics, as well as in a reduced 3-dimensional model, as we vary two of the key mortality parameters. Our results show that chaos is robust to the variation of parameters as well as to the presence of environmental noise, where the attractor of the more complex system is more robust than the attractor of its simplified equivalent. We find robust chaotic dynamics in low trophic order ecological models, suggesting that chaotic dynamics might be ubiquitous in the more complex models, but this is rarely observed in DGOM simulations. The physical equations of DGOMs are well understood and are constrained by conservation principles, but the ecological equations are not well understood, and generally have no explicitly conserved quantities. This work, in the context of the paucity of the empirical and theoretical bases upon which DGOMs are constructed, raises the interesting question of whether DGOMs better represent reality if they include or exclude chaotic dynamics, but also points to a need for a comprehensive approach to model development and testing. We contend that the DGOM community can learn important lessons from the analysis of simple models, and should consider a spectrum of methods from the analysis of simple(r) zero-dimensional models of population interactions through to numerical simulations of fully coupled biogeophysical models.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Marine Systems - Volume 139, November 2014, Pages 483-495
Journal: Journal of Marine Systems - Volume 139, November 2014, Pages 483-495
نویسندگان
Roger Cropp, Irene M. Moroz, John Norbury,