Disturbance and rehabilitation of lakeside Phragmites reeds following an extreme flood in Lake Constance (Germany)

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2003
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Dienst, Michael
Schmieder, Klaus
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Hydrobiologia. 2003, 506-509(1-3), pp. 687-695. eISSN 0018-8158. Available under: doi: 10.1023/B:HYDR.0000008622.60094.6d
Zusammenfassung

After an extreme flood in Lake Constance in 1999 the Phragmites australis belt showed a severe decline in area and vitality. A three year monitoring project was installed in 2000 to document the die-back and rehabilitation process immediately afterwards, to identify the co-factors of the damage, and to find out significant stressors that may impede the recovery of the reeds. The monitoring is based on CIR aerial photo interpretation, quantitative GIS analyses and field investigations on shoot density, stand structure and biomass production in 50 monitoring plots, grouped in five degrees of damage. In result we found that c. 0.306 km2 of aquatic reed bed area died back at Lake Constance-Untersee (i.e. 23% of the former area in 1998). Among the stands which had survived the severely damaged stands were mainly composed of secondary shoots, whereas primary and insect infested shoots dominated in less damaged stands. The development from 2000 to 2001 was characterized by an overall decrease in shoot density, a change in the composition of the shoot population in favour of primary shoots, and in a recovery in culm stature. All variables depended on the degree of initial damage by the extreme flood. A conceptual model is proposed to assess the future development of Lake Constance reeds.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
570 Biowissenschaften, Biologie
Schlagwörter
Phragmites australis, disturbance ecology, flooding tolerance, littoral vegetation, reed die-back, stand structure
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Zitieren
ISO 690OSTENDORP, Wolfgang, Michael DIENST, Klaus SCHMIEDER, 2003. Disturbance and rehabilitation of lakeside Phragmites reeds following an extreme flood in Lake Constance (Germany). In: Hydrobiologia. 2003, 506-509(1-3), pp. 687-695. eISSN 0018-8158. Available under: doi: 10.1023/B:HYDR.0000008622.60094.6d
BibTex
@article{Ostendorp2003Distu-7323,
  year={2003},
  doi={10.1023/B:HYDR.0000008622.60094.6d},
  title={Disturbance and rehabilitation of lakeside Phragmites reeds following an extreme flood in Lake Constance (Germany)},
  number={1-3},
  volume={506-509},
  journal={Hydrobiologia},
  pages={687--695},
  author={Ostendorp, Wolfgang and Dienst, Michael and Schmieder, Klaus}
}
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    <dcterms:abstract xml:lang="eng">After an extreme flood in Lake Constance in 1999 the Phragmites australis belt showed a severe decline in area and vitality. A three year monitoring project was installed in 2000 to document the die-back and rehabilitation process immediately afterwards, to identify the co-factors of the damage, and to find out significant stressors that may impede the recovery of the reeds. The monitoring is based on CIR aerial photo interpretation, quantitative GIS analyses and field investigations on shoot density, stand structure and biomass production in 50 monitoring plots, grouped in five degrees of damage. In result we found that c. 0.306 km2 of aquatic reed bed area died back at Lake Constance-Untersee (i.e. 23% of the former area in 1998). Among the stands which had survived the severely damaged stands were mainly composed of secondary shoots, whereas primary and insect infested shoots dominated in less damaged stands. The development from 2000 to 2001 was characterized by an overall decrease in shoot density, a change in the composition of the shoot population in favour of primary shoots, and in a recovery in culm stature. All variables depended on the degree of initial damage by the extreme flood. A conceptual model is proposed to assess the future development of Lake Constance reeds.</dcterms:abstract>
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