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High species richness of sheep-grazed sand pastures is driven by disturbance tolerant and weedy short-lived species
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  • Gergely Kovacsics-Vári,
  • Judit Sonkoly,
  • Katalin Tóth,
  • Andrea McIntosh-Buday,
  • Patricia Díaz Cando,
  • Viktória Törő-Szijgyártó,
  • Nóra Balogh,
  • Luis Guallichico Suntaxi,
  • Francis Espinoza Ami,
  • Gábor Matus,
  • Béla Tóthmérész,
  • Peter Torok
Gergely Kovacsics-Vári
University of Debrecen
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Judit Sonkoly
University of Debrecen
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Katalin Tóth
University of Debrecen
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Andrea McIntosh-Buday
HUN-REN-UD Functional and Restoration Ecology RG
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Patricia Díaz Cando
University of Debrecen
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Viktória Törő-Szijgyártó
University of Debrecen
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Nóra Balogh
University of Debrecen
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Luis Guallichico Suntaxi
University of Debrecen
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Francis Espinoza Ami
University of Debrecen
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Gábor Matus
University of Debrecen
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Béla Tóthmérész
Debrecen University
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Peter Torok
University of Debrecen

Corresponding Author:[email protected]

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Abstract

We selected 15 sheep-grazed sand pastures along increasing grazing intensity to study fine scale biomass patterns of main fractions (green biomass, litter) and that of plant species and functional groups (life forms and social behaviour types). We classified them into five grazing intensity levels based on stocking rate, proximity to drinking and resting places, and the number of droppings and other tracks of grazing animals. We formulated three study questions: i) How does increasing intensity of sheep grazing affect the amount of green biomass, species richness and their relationship in sand pastures? ii) How does increasing intensity of sheep grazing affect the biomass of perennial and short-lived graminoids and forbs? iii) How does disturbance value (expressed in the biomass ratio of disturbance tolerant and ruderal species) change along the gradient of grazing intensity? A unimodal relationship between green biomass and species richness was detected. Along the grazing intensity gradient, we found an increasing trend for species richness; significant differences for green biomass (decreasing trend) and litter (decreasing trend), moreover for graminoids (decreasing trend), and short-lived forbs (increasing trend). We found an increasing amount of disturbance tolerant and ruderal species with increasing grazing intensity. We concluded that stocking rate and proximity to drinking and resting places jointly affected vegetation and created an uneven pattern for composition and amount of biomass in all grazing intensity levels. Our findings might be instructive for pastures in densely populated regions which are prone to the encroachment of disturbance-tolerant and ruderal species.
27 Jan 2024Submitted to Ecology and Evolution
29 Jan 2024Submission Checks Completed
29 Jan 2024Assigned to Editor
06 Feb 2024Reviewer(s) Assigned
16 Apr 2024Review(s) Completed, Editorial Evaluation Pending
16 Jul 20241st Revision Received
17 Jul 2024Assigned to Editor
17 Jul 2024Submission Checks Completed
17 Jul 2024Review(s) Completed, Editorial Evaluation Pending
29 Jul 2024Reviewer(s) Assigned
13 Aug 2024Editorial Decision: Revise Minor
20 Aug 20242nd Revision Received
23 Aug 2024Submission Checks Completed
23 Aug 2024Assigned to Editor
23 Aug 2024Review(s) Completed, Editorial Evaluation Pending
27 Aug 2024Editorial Decision: Accept