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The Wiegand Lab
ERC
Former members
Recent visitors
2011
2010
2009
Students
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Sandro Pütz
(UFZ Leipzig)
Sandro started his Ph.D. thesis in
Leipzig in October 2000, and is working in a collaborative project
with the IFEVA- Dep. Ecología, Facultad de Agronomía (Universidad de
Buenos Aires) on "The impact of landscape heterogeneity on
grazing-induced degradation of Patagonian steppes". He finished
his thesis in 2006 and is now postdoc postoctoral researcher
at the OESA and involved in the Mata Atlantica project on
biodiversity conservation in fragmented landscapes at the Atlantic
Plateau of São Paulo (Brazil) (BioCAPSP) .
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Stephanie Schadt
(UFZ Leipzig)
Stephanie obtained a Deutschen
Bundesstiftung Umwelt (DBU) grant for her Ph.D. thesis on "Scenarios
for a viable lynx population in Germany using a GIS-based, spatially
explicit and individual-based population model", which started
in May 1999. Stephanie finished her thesis in May 2002 and was
postdoc at the OESA. At the moment she is Marie Curie fellow at the
University of Bergen, Norway.
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Pablo Cipriotti
(Uni Buenos Aires, Argentine),
co-supervision
Pablo started his Ph.D. thesis in
2000 and finished in 2006. He was the Argentinean Ph.D. student of
the collaborative project with the IFEVA- Dep. Ecología, Facultad de
Agronomía (Universidad de Buenos Aires) on "The impact of
landscape heterogeneity on grazing-induced degradation of Patagonian
steppes".
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Javier Naves
(University Oviedo, Spain), director
del thesis
I started to collaborate with Javier
in 1994 on modeling the population dynamics of the endangered brown
bear population in the Cantabrian Mountains because I was looking
for an excuse to return sometimes to the good food, the exciting
landscape, and of course to some Sidrería in Oviedo. However, our
joined research project went that well that Javier asked me to
become the director of his Ph.D. In 1999 he finished his Ph.D.
thesis on "The risk of extinction for the brown bears (Ursus
arctos) in the Cordillera Cantabrica (Spain): the western
population". This
work summarized
more than 15 years of his brown bear research in northern Spain, and
5 years of our ongoing collaboration. Since August 2002 is working
in a "Fremd F+E" project on "Analyzing extinction, habitat loss
and fragmentation of brown bears (Ursus arctos)
in northern Spain: recent and historical perspectives".
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Stephan Getzin
(Uni Jena, Germany), co-supervision
Stephan started his
PhD in 2003 and finished in 2007. In his thesis he attempted to
contribute to selected topics in forest ecological research to
better understand essential processes that lead to small- and
large-scale forest structures. His topics were centered on point
pattern analysis of fully mapped forest stands to analyze their
spatial structure and to reveal which processes and factors may
determined the structure of these forest communities. Comparative
analyses were done by comparing chronosequences of stands of
different age and stands with homogeneous and heterogeneous
environmental conditions. He also analyzed asymmetric tree growth at
the stand level by comparing the stem pattern and the crown patterns
and used recent remote sensing techniques to assess competition at
the stand level from field-measured and photo-derived crown extent.
Stephan made in his PhD excessively use
of my software
Programita for doing his point-pattern analyses.
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Adan Abajo
(University
Oviedo, Spain), co-director de thesis
The objective of Adans PhD is to obtain a better
understanding of habitat use and the extinction dynamics of the
Cantabrian Capercaillie (Tetrao urogallus cantabricus) in the
Cantabrian Mountains (in the NW of Spain) and to assess the
viability of the highly endangered (meta)population. His PhD
consists in three steps: (1) development of a model of habitat
suitability, (2) an inverse-pattern-oriented analysis of
individual-based dispersal models to assess connectivity among leks
and to reveal dispersal rules of Capercaillie which agree with the
observed extinction pattern of leks, and (3) a full
spatially-explicit population model to reconstruct the past dynamics
and to assess the viability of the (meta)population. Adan
successfully defended his thesis in April 2007.
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Isabel
Martínez
(University Oviedo, Spain),
co-supervision
Isa’s
research interests are focused in the study of plant-animal
interactions during plant reproduction, i.e. through fruit
production, seed dispersal, post-dispersal seed predation and
seedling germination and survival. She used the tree community in
secondary temperate forest as study system. In the Cantabrian range,
these forest are mainly composed of fleshy fruited trees (holly
Ilex aquifolium, yew Taxus baccata, and hawthorn
Crataegus monogyna), and dry fruited tree species like beech
Fagus sylvatica and hazel Corylus avellana. Isa
mapped all stems in a plot of an old-growth forest and monitored
seedlings in 1m2 plots distributed over different micro
sites within the plot. She used this data to perform detailed
point-pattern analysis using Programita to describe (1) the
pattern of individual species, the association pattern between pairs
of species, (3) the pattern of seedlings relative to adults, and (4)
the spatio-temporal pattern of seedlings. The aim of these analyses
was to accumulate evidence against or in favor of hypotheses about
mechanisms and processes determining community dynamics and to
derive new hypotheses to be evaluated in the field.
Isa successfully defended
her thesis in July 2007. Since June 2008 she is Postdoc with a Marie
Curie fellowship in Leipzig modeling
Pyrenean
Treelines under a changing climate. In April 2011 she
started a Postdoc with
Eloy Revilla at the EBD in Sevilla.
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Rajapandian K
(Wildlife
Institute of India, Dehradun), co-supervision
Raja obtained a DAAD sandwich
fellowship to spends one year in Leipzig to develop habitat
models for predicting habitat occupancy of tiger (Panthera tigris)
and its prey species in the Indian portion of Terai Arc Landscape
(TAL) and and to evaluate landscape connectivity using a
spatially-explicit and individual-based approach. Further
objectives are to evaluate the previously identified corridors in
respect to their ability to connect habitat patches, to assess the
interaction between landscape structure and dispersing individuals
among subpopulations, and to provide conservation and management
implications for the long-term survival of tiger and other wildlife
species in this landscape.Since September 2008
Raja is working in my ERC project.
Visitors
2002
2003
2004
2005
2006
2007
2008
Argentina
South Africa
Spain
Other Countries
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Steve
Higgins (University Frankfurt)
The South African modeler found his way to
Germany and shared office with me. Steve is profesor for physical geography at
the University of Frankfurt.
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Felix
Knauer (Uni Freiburg)
After my good experience with the brown bear
project in Spain I was happy to broaden my brown bear research with scientist
from a research station in the German Alps, only five minutes away from one of
the castles of Bavarians mad Kings Ludwig in Linderhof. Although another
excuse to escape to nicer areas, the joined research with Felix on the
extension of brown bears into the eastern Alps went so well that it became the
nucleus for my habilitation thesis which I finished in 1999 at
Ludwig-Maximilians-Universität Munich. After 5 years work in the Slovenian
bear telemetry project (Project Medved) for his Ph.D thesis, Felix left the
Alps in 2001 and moved to the Netherlands but returned 2004 to Germany.
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