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Effects of interaction between eutrophication and major environmental factors on the ecosystem stability of reed vegetation in European landwaterecotones

Objective

To investigate the effect of continued eutrophication on the ecosystem stability of reed stands under different water table regimes and temperature conditions.


The project will examine the effects of interactions between eutrophication, water table management and temperature on ecophysiological processes in reed plants and biogeochemical processes in the rhizosphere of reed. Changes in these processes are supposed to be involved in the die-back of reed stands. Variability within and between reed populations will be studied to prove (or disprove) that populations with limited genetic variability will be more susceptible to environmental stress than populations which are highly variable, or which are already adapted to high nutrient loads.

The following tasks will be addressed:

A) Determination of growth and productivity of reed populations at contrasting European localities.

B) Field investigation of carbon and nutrient (especially nitrogen) cycles within reed stands in relation to the trophy status and the water table management of the sites.

C) Determination of the effects of eutrophication, water table fluctuations and oxygen demand in the sediment on oxygen transport within the reed plants, architectural and anatomical structures related to O2 transport, and viability and growth of rhizomes and roots.

D) Examination of the impacts of nutrient enrichment, temperature, and water table fluctuations on biogeochemical fluxes of C and N compounds, and on the characteristics of dominant nitrate-reducing bacteria.

E) Determination of the genetic variability within and between European reed populations in relation to the trophic status of the site, hydrological situation, and the performance of the reed to progress or to be subject to die-back.

The expected results of these investigations are intended to provide the scientific basis for the conservation and/or a more rational management of this important component of wetlands.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

ROYAL NETHERLANDS ACADEMY OF ARTS AND SCIENCE
Address
22,Boterhoeksestraat 48
6666 ZG Heteren
Netherlands

Participants (6)

Humboldt-Universität zu Berlin
Germany
Address
Luisenstraße 53
10117 Berlin
Institute of Botany - Academy of Sciences of the Czech Republic
Czechia
Address
145,Dukelská
379 01 Trebon
Ungarische Akademie Wissenschaft
Hungary
Address
2-4,Alkotmány Út
2163 Vácrátót
Universidade de Evora
Portugal
Address
1,Largo Dos Colegiais
7001 Evora
University of Hull
United Kingdom
Address
Cottingham Road
HU6 7RX Hull
Århus Universitet
Denmark
Address
68,Nordlandsvej
8240 Risskov