A spatially distributed,deterministic approach to modeling Typha domingensis(cattail)in an Everglades wetland  

作　　者：Gareth Lagerwall Gregory Kiker Rafael Muñoz-Carpena Matteo Convertino Andrew James Naiming Wang 

机构地区：[1]Frazier Rogers Hall,University of Florida,PO Box 110570,Gainesville,FL 32611-0570,USA [2]Soil and Water Engineering Technology,Inc.,3960 Magnolia Leaf L,SuwaneeGA 30024,USA [3]Hydrologic and Environmental Systems Modeling,South Florida Water Management District,3301 Gun Club Rd,West Palm Beach,FL 33406,USA.

出　　处：《Ecological Processes》2012年第1期12-32,共21页生态过程（英文）

摘　　要：Introduction:The emergent wetland species Typha domingensis(cattail)is a native Florida Everglades monocotyledonous macrophyte.It has become invasive due to anthropogenic disturbances and is out-competing other vegetation in the region,especially in areas historically dominated by Cladium jamaicense(sawgrass).There is a need for a quantitative,deterministic model in order to accurately simulate the regional-scale cattail dynamics in the Everglades.Methods:The Regional Simulation Model(RSM),combined with the Transport and Reaction Simulation Engine(TARSE),was adapted to simulate ecology.This provides a framework for user-defineable equations and relationships and enables multiple theories with different levels of complexity to be tested simultaneously.Five models,or levels,of increasing complexity were used to simulate cattail dynamics across Water Conservation Area 2A(WCA2A),which is located just south of Lake Okeechobee,in Florida,USA.These levels of complexity were formulated to correspond with five hypotheses regarding the growth and spread of cattail.The first level of complexity assumed a logistic growth pattern to test whether cattail growth is density dependent.The second level of complexity built on the first and included a Habitat Suitability Index(HSI)factor influenced by water depth to test whether this might be an important factor for cattail expansion.The third level of complexity built on the second and included an HSI factor influenced by soil phosphorus concentration to test whether this is a contributing factor for cattail expansion.The fourth level of complexity built on the third and included an HSI factor influenced by(a level 1–simulated)sawgrass density to determine whether sawgrass density impacted the rate of cattail expansion.The fifth level of complexity built on the fourth and included a feedback mechanism whereby the cattail densities influenced the sawgrass densities to determine the impact of inter-species interactions on the cattail dynamics.Results:All the simulation results from

关 键 词：TYPHA MODELING ECOLOGY Dynamics Model complexity Water conservation area 2A Transport and reaction simulation engine Regional simulation model 

分 类 号：O57[理学—粒子物理与原子核物理]