Blar i NINA Brage på forfatter "Hawkins, Heidi-Jayne"
-
Does defoliation frequency and severity influence plant productivity? The role of grazing management and soil nutrients
Venter, Alexander Samuel; Hawkins, Heidi-Jayne; Cramer, Michael D. (Peer reviewed; Journal article, 2020)Rangeland management approaches, including rotational grazing, rely on assumptions about plant growth responses to the intensity, or severity (sward height) plus frequency, of defoliation. We tested these assumptions at ... -
Fire and herbivory shape soil arthropod communities through habitat heterogeneity and nutrient cycling in savannas
Thoresen, Joshua; Vermeire, Marie-Liesse; Venter, Zander; Wolfaard, Graeme; Krumins, Jennifer Adams; Cramer, Michael; Hawkins, Heidi-Jayne (Peer reviewed; Journal article, 2021)Soil arthropods are important components of savannas, contributing to nutrient cycling and thus primary productivity. To investigate how fire and mammalian herbivores influ- ence arthropod food webs, we used two long term ... -
A holistic view of Holistic Management: What do farm-scale, carbon, and social studies tell us?
Hawkins, Heidi-Jayne; Venter, Zander; Cramer, Michael D. (Peer reviewed; Journal article, 2022)Holistic Management (HM) is claimed to increase production of plants and animals while also increasing soil organic carbon under all conditions in all habitats. Peer-review literature does not support these claims, but ... -
Mapping soil organic carbon stocks and trends with satellite-driven high resolution maps over South Africa
Venter, Zander; Hawkins, Heidi-Jayne; Cramer, Michael D.; Mills, Anthony J. (Peer reviewed; Journal article, 2021)Estimation and monitoring of soil organic carbon (SOC) stocks is important for maintaining soil productivity and meeting climate change mitigation targets. Current global SOC maps do not provide enough detail for landscape- ...