Filters: Tags: grassland extent (X)4 results (85ms)
Conclusions:The Sprague's pipit tends to occupy native grassland habitats containing very little or no woody vegetation, with non-native areas populated to a significantly lower extentThresholds/Learnings:
Conclusions:High proportions of native grass and low proportions of shrub cover are critical habitat components for maintaining viable sharp tailed grouse populations. *Note that this study generated landscape level models with coarse variables, and the thresholds and values used may not be directly applicable to other areas or for site-specific analysis.Thresholds/Learnings:Ideal shrub cover ranges from 5% to 15% and the ideal proportion of native grassland cover is >75% for sharp-tailed grouse*.
Conclusions:Native prairie was found to be the most suitable habitat for long-billed curlew. Agriculture lands were used secondarily to varying degrees, and shrublands were considered unsuitable. *Note that this study generated landscape level models with coarse variables, and the thresholds and values used may not be directly applicable to other areas or for site-specific analysis.Thresholds/Learnings:Shrub coverage greater that 10% was considered undesirable for the long-billed curlew*
Conclusions:Influx of woody vegetation associated with fragmentation correlates with decline in grassland bird speciesThresholds/Learnings:When native grassland cover dropped below 60% at one site, and 30-40% at another site, the arrangement or habitat patches became more important to the survival of populations than habitat amount alone