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Papers by Bärbel Koch

Research paper thumbnail of Artenvielfalt auf verbuschten Alpweiden: Empfehlungen zur Bewirtschaftung von artenreichen Alpweiden mit Verbuschungsproblemen

Research paper thumbnail of Série AlpFUTUR: Biodiversité précieuse dans les herbages des alpages envahis par les brousailles

Research paper thumbnail of Zwei für die Schweiz «neue» Florfliegenarten (Neuroptera: Chrysopidae)

Chrysopa walkeri MacLachlan, 1893 was found in 2002 and 1991 at two places in southern Switzerlan... more Chrysopa walkeri MacLachlan, 1893 was found in 2002 and 1991 at two places in southern Switzerland (Canton Ticino: Meride and Castel San Pietro). Old museum specimens labelled as Chrysopa phyllochromaWesmael, 1848 in the collection of Willy Eglin at the Natural History Museum in Basel turned out to be Chrysopa commata Kis & Ujhelyi, 1965 from the Cantons of Wallis and Aargau, and from places near Basel in France.

Research paper thumbnail of Phosphorus redistribution by dairy cattle on a heterogeneous subalpine pasture, quantified using GPS tracking

Agriculture, Ecosystems & Environment

Abstract Traditional summer pastures in the Alps have been shaped by centuries of grazing by dome... more Abstract Traditional summer pastures in the Alps have been shaped by centuries of grazing by domestic livestock. To understand the effects of this land use on nutrient cycling, we quantified phosphorus (P) fluxes on a summer farm in southeastern Switzerland. We used high-frequency GPS tracking to record the spatial distribution of animal activities over an entire grazing season, and used these data to model spatial patterns of P depletion and accumulation at various spatial scales (the entire farm, four vegetation groups, 900 m2 sampling plots and 10 × 10 m2 grid cells). Since the model depended on parameter values obtained from diverse sources, we tested its robustness using Monte Carlo simulations based upon varying parameter values. The model indicated very small net P fluxes (between − 0.05 and + 0.05 kg P ha−1 yr−1) over nearly half (49%) of the pasture, mostly in dwarf-shrub vegetation. In a further 44% of the area, P depletion exceeded ‐0.05 kg P ha−1 yr−1, representing a total loss of 39.4 kg P yr−1 (2.1 kg P ha−1). A positive P balance of over 0.05 kg P ha−1 yr−1 was indicated for 6.6% of the area, representing a total annual accumulation of 16.4 kg P (1.8 kg P ha−1). The overall P balance for the entire summer farm was thus negative. The patches of substantial depletion or accumulation formed a mosaic in the areas most used by cattle. More active management of cattle and stable manure is recommended to maintain the delivery of ecosystem services.

Research paper thumbnail of Einfluss der Habitateigenschaften auf das Verbreitungsmuster von Coenagrion mercuriale an einem renaturierten Fließgewässer im Schweizer Mittelland (Odonata: Coenagrionidae)

Research paper thumbnail of Shrub Encroachment Affects the Diversity of Plants, Butterflies, and Grasshoppers on Two Swiss Subalpine Pastures

Arctic, Antarctic, and Alpine Research, 2015

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Surrogate taxa and impact factors for plants and insects on Swiss summer pastures

Research paper thumbnail of Artenvielfalt auf verbuschten Alpweiden: Empfehlungen zur Bewirtschaftung von artenreichen Alpweiden mit Verbuschungsproblemen

Research paper thumbnail of Série AlpFUTUR: Biodiversité précieuse dans les herbages des alpages envahis par les brousailles

Research paper thumbnail of Zwei für die Schweiz «neue» Florfliegenarten (Neuroptera: Chrysopidae)

Chrysopa walkeri MacLachlan, 1893 was found in 2002 and 1991 at two places in southern Switzerlan... more Chrysopa walkeri MacLachlan, 1893 was found in 2002 and 1991 at two places in southern Switzerland (Canton Ticino: Meride and Castel San Pietro). Old museum specimens labelled as Chrysopa phyllochromaWesmael, 1848 in the collection of Willy Eglin at the Natural History Museum in Basel turned out to be Chrysopa commata Kis & Ujhelyi, 1965 from the Cantons of Wallis and Aargau, and from places near Basel in France.

Research paper thumbnail of Phosphorus redistribution by dairy cattle on a heterogeneous subalpine pasture, quantified using GPS tracking

Agriculture, Ecosystems & Environment

Abstract Traditional summer pastures in the Alps have been shaped by centuries of grazing by dome... more Abstract Traditional summer pastures in the Alps have been shaped by centuries of grazing by domestic livestock. To understand the effects of this land use on nutrient cycling, we quantified phosphorus (P) fluxes on a summer farm in southeastern Switzerland. We used high-frequency GPS tracking to record the spatial distribution of animal activities over an entire grazing season, and used these data to model spatial patterns of P depletion and accumulation at various spatial scales (the entire farm, four vegetation groups, 900 m2 sampling plots and 10 × 10 m2 grid cells). Since the model depended on parameter values obtained from diverse sources, we tested its robustness using Monte Carlo simulations based upon varying parameter values. The model indicated very small net P fluxes (between − 0.05 and + 0.05 kg P ha−1 yr−1) over nearly half (49%) of the pasture, mostly in dwarf-shrub vegetation. In a further 44% of the area, P depletion exceeded ‐0.05 kg P ha−1 yr−1, representing a total loss of 39.4 kg P yr−1 (2.1 kg P ha−1). A positive P balance of over 0.05 kg P ha−1 yr−1 was indicated for 6.6% of the area, representing a total annual accumulation of 16.4 kg P (1.8 kg P ha−1). The overall P balance for the entire summer farm was thus negative. The patches of substantial depletion or accumulation formed a mosaic in the areas most used by cattle. More active management of cattle and stable manure is recommended to maintain the delivery of ecosystem services.

Research paper thumbnail of Einfluss der Habitateigenschaften auf das Verbreitungsmuster von Coenagrion mercuriale an einem renaturierten Fließgewässer im Schweizer Mittelland (Odonata: Coenagrionidae)

Research paper thumbnail of Shrub Encroachment Affects the Diversity of Plants, Butterflies, and Grasshoppers on Two Swiss Subalpine Pastures

Arctic, Antarctic, and Alpine Research, 2015

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Surrogate taxa and impact factors for plants and insects on Swiss summer pastures

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