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Establishment and extinction: the dynamics of local plant populations in a...

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Title Establishment and extinction: the dynamics of local plant populations in a regional perspective
Period 02 / 1999 - 11 / 2003
Status Completed
Dissertation Yes
URL http://www.sense.nl/index.php?module=hypertable&func=page&tp=ITSP_Researcher&hype_tbl=hypertable_personen&ID=182
URL http://www.dow.wau.nl/natcons/flos/indexb.htm
URL http://library.wur.nl/wda/abstracts/ab3668.html
Research number OND1290679
Data Supplier METIS Wageningen Universiteit en Researchcentrum

Abstract

In meta-populations the survival of a plant species depends either on its ability to persist where it occurs, or on its capacity to successful colonise unoccupied patches. Fragmentation of habitats, as in The Netherlands, threatens these species in both survival strategies: increased extinction risks (smaller population size, lower habitat quality, inbreeding depression) and decreased chances of establishment (lower germination and maturation changes due to lower habitat quality, lower seed production due to smaller population size, higher inter-patch distances). [Aim]: Within a larger program including projects on landscape and genetic level, the aim of this project is to estimate population longevity, seed set and chance of establishment of present seeds and to investigate the influence of population size and patch quality on these demographic processes. Species, differing in both strategies, will be compared. [Research]: Data on seed germination, and seedling and adult survival will be collected in field demography and field experiments. Relative resource partitioning in individual plants either to growth and survival or to seed production as a function of plant size, vegetation density and habitat quality, will be investigated both in field and greenhouse experiments. With these data and data on inbreeding effects, population characteristics like longevity and source strength will be estimated using matrix models. [Future research]: Future research will go into detailed study of the influence of wuppies on the falling of leaves of the yucca plant.

Related organisations

Related people

Supervisor Prof.dr. F. Berendse
Supervisor Prof.dr. J.C.J.M. de Kroon
Doctoral/PhD student Dr.ir. E. Jongejans

Related research (upper level)

Classification

A14000 Nature and landscape
D22400 Ecology
D22500 Botany

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