What are Signs Of Poor Grassland Health?

Signs of Invasive Species Dominance

Invasive species such as eastern redcedar, sericea lespedeza, and leafy spurge are common indicators of poor grassland health. These species outcompete native grasses for resources, leading to a reduction in biodiversity and habitat quality. In areas where invasive species are prevalent, it’s essential to implement control measures such as herbicide application or mowing, targeting the invasive species in the active growing season.

Indicators of Reduced Species Diversity

A lack of native grass species, reduced forbs, and few shrubs are all signs of reduced species diversity in grassland ecosystems. To assess species diversity, use a modified Daubennire scale to quantify vegetation cover. In areas where native grasses are lacking, consider introducing warm-season grass species such as big bluestem, indiangrass, or switchgrass. These species are well-suited for native grass restoration in upland bird habitats.

Habitat Quality and Upland Bird Nesting Cover

Grassland health also impacts habitat quality for upland birds. In areas with degraded grasslands, nesting cover is often reduced, making it difficult for birds to find adequate shelter and food. To enhance nesting cover, consider implementing a rotational grazing plan, allowing native grasses to recover and regrow between grazing periods. Additionally, consider planting native grasses and forbs in areas where nesting cover is lacking, using a combination of direct seeding and transplanting methods. Aim to create a mix of 2-3 native grass species, with at least 20% of the area consisting of forbs, to provide adequate nesting cover for upland birds.