Conservation planning for successional landscapes

Drechsler, Martin, Lourival, Reinaldo and Possingham, Hugh P (2009) Conservation planning for successional landscapes. Ecological Modelling, 220 4: 438-450. doi:10.1016/j.ecolmodel.2008.11.013


Author Drechsler, Martin
Lourival, Reinaldo
Possingham, Hugh P
Title Conservation planning for successional landscapes
Journal name Ecological Modelling   Check publisher's open access policy
ISSN 0304-3800
Publication date 2009-02
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.ecolmodel.2008.11.013
Volume 220
Issue 4
Start page 438
End page 450
Total pages 13
Editor Fath, B.D.
Place of publication Netherlands
Publisher Elseveir BV
Collection year 2010
Language eng
Subject C1
9608 Flora, Fauna and Biodiversity
050202 Conservation and Biodiversity
Abstract The systematic conservation planning literature invariably assumes that the biodiversity features being preserved in sites do not change through time. We develop a conservation planning framework for ecosystems where disturbance events and succession drive vegetation dynamics. The framework incorporates three key attributes of disturbance theory: heterogeneity in disturbance rates, spatial correlation between disturbance events and different impacts of disturbance. In our conservation problem we wish to maximise the chance that we represent a certain number of successional types given a cap on the number of sites we can conserve. Correlation between disturbance events dramatically complicates the problem of choosing the optimal suite of sites. However, in our problem we discover that spatial correlation in disturbances affects the optimal reserve network very little. The reason is twofold: (i) through our probabilistic framework we focus on the long-term effectiveness of reserve networks and (ii) in the dynamics considered in our model the state of a site is not only affected by the most recent (correlated) disturbance event but also by the site's long-term stochastic history which blurs the impact of spatial correlation. If successional states are the conservation target rather than individual species then, conserving a site can only contribute to meeting one target. However, given that correlation of disturbance events may be ignored, we show that if the number of candidate reserves is sufficiently large the statistical dependence of different conservation targets may be ignored, too. We conclude that the computational complexity of reserve selection methods for dynamic ecosystems can be much simpler than they first appear.
Keyword Succession
probabilistic model
directionality
site selection
conservation
planning
correlation
heterogeneity
Reserva Ecologica da Juatinga
disturbance
adequacy
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 03 Sep 2009, 08:36:25 EST by Mr Andrew Martlew on behalf of School of Biological Sciences