Johannes Isselstein

Prof. Johannes Isselstein

Department of Crop Sciences, Grassland Science, Georg-August-University of Göttingen, Göttingen, Germany
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Research Focus & Metrics

Academic Career Length

25Years (2002-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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15 August 2005 in Grass and Forage Science
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Journal Article
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MKM. Kayser
M. Kayser
JIJohannes Isselstein
Johannes Isselstein

5 June 2002 in Restoration Ecology
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Journal Article
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JIJohannes Isselstein
Johannes Isselstein
JTJ. R. B. Tallowin
J. R. B. Tallowin
RSR. E. N. Smith
R. E. N. Smith

4 February 2020 in Sustainability
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A (Agnes) Van den Pol-van DasselaarA (Agnes) Van den Pol-van Dasselaar
A (Agnes) Van den Pol-van Dasselaar
Deirdre HennessyDeirdre Hennessy
Deirdre Hennessy
JIJohannes Isselstein
Johannes Isselstein
Grazing is inherently close to the nature of herbivores, but no longer applied everywhere in Europe. Therefore, the perception of grassland experts on the occurrence, importance, constraints, solutions and future of grazing of dairy cows was studied. The study builds on results from the European Grassland Federation Working Group Grazing in the period 2010–2019. Both surveys and focus group meetings were used. There is a clear trend of reduced grazing in Europe. Since grazing is valued by different stakeholders and provides many ecosystem services, solutions to the constraints to grazing must be found. Constraints can be divided into region specific constraints, farm specific constraints and farmer specific constraints. The solutions include developing new knowledge, bringing the knowledge already available to practice and rewarding farmers for grazing as a service to society. If grazing is not supported, it will further decline. However, a joined endeavour has the potential to make a significant difference in transforming grass-based production systems and stimulating grazing.

13 June 2007 in Grass and Forage Science
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Journal Article
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JIJohannes Isselstein
Johannes Isselstein
BGB. A. Griffith
B. A. Griffith
PPP. Pradel
P. Pradel
SVS. Venerus
S. Venerus

5 February 2020 in Functional Ecology
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CPCaren M. Pauler
Caren M. Pauler
JIJohannes Isselstein
Johannes Isselstein
MSMatthias Suter
Matthias Suter
JBJoel Berard
Joel Berard
TBThomas Braunbeck
Thomas Braunbeck
MSManuel K. Schneider
Manuel K. Schneider
Forage selection by herbivores is a major driver of plant diversity in pasture vegetation. Yet, we know relatively little about how plant traits influence decisions of different herbivore species and breeds to select or avoid a certain plant species on semi‐natural pastures. We quantified the influence of the traits leaf N and P content, leaf dry matter content (LDMC), specific leaf area (SLA) and physical defence mechanisms on plant species selection for three cattle breeds: high‐yielding Angus × Holstein crossbreed, dual‐purpose Original Braunvieh and undemanding Highland Cattle. The cattle grazed a series of adjacent paddocks in different alpine pastures. Plant species selection was quantified by assessing the difference in biomass proportions of all plant species in 66 vegetation subplots per breed before and after grazing. Plant traits and indicator values were extracted from the TRY database. Data on 152 plant species were analysed using a local mixed‐effects model and a global multivariate hierarchical regression model. Plant traits had a clear impact on forage behaviour. Plants with high SLA, leaf N and P contents were significantly selected, whereas plants with high LDMC (e.g. woody plants) and defence mechanisms (e.g. thistles) were generally avoided. Species with high forage quality indicator values as defined by Briemle et al. (2002) were significantly preferred. More importantly, significant differences between forage behaviour of cattle breeds were detected. Selection by less‐productive Highland Cattle was much less influenced by plant traits than the selection by the two higher‐yielding breeds. Results indicate a clear impact of plant traits on forage selection and demonstrate breed‐specific influences. Highland Cattle (and possibly other robust breeds) graze less selectively and impose less selective exclusion on plants. Thereby, they likely influence plant species composition of pastures in a different way than high‐yielding breeds, thereby creating a distinct habitat. A free Plain Language Summary can be found within the Supporting Information of this article.

1 December 2003 in Grass and Forage Science
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OCO. Correll
O. Correll
JIJohannes Isselstein
Johannes Isselstein
VPV. Pavlu
V. Pavlu