Essays about: "herbivore impact"
Showing result 1 - 5 of 16 essays containing the words herbivore impact.
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1. Optimal foraging in an Arctic herbivore : How does the foraging behaviour of Svalbard reindeer (Rangifer tarandus platyrhynchus) respond to seasonal changes from summer through autumn of the Arctic tundra?
University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskapAbstract : Foraging decisions of large herbivores can be affected by many factors and have great effect on both above- and below-ground ecosystems. Here, I determine to which degree temporal (seasonality), or spatial (habitat) factors influence the foraging behaviour of Svalbard reindeer (Rangifer tarandus platyrhynchus) and asses if small-scale foraging behaviour correlates with an animals’ patch residence time. READ MORE
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2. Tritrophic interactions with Silphium integrifolium at the axis : elucidating the role of arbuscular mycorrhizal fungal species on plant phenotype
University essay from SLU/Dept. of Plant Protection BiologyAbstract : A fundamental understanding of the intricate interactions between crops and their environment may help guide the development of ecologically intensified agriculture. Arbuscular mycorrhizal fungi (AMF) are root symbionts that can increase a plant’s access to soil resources and have been found to reprogram plant defensive mechanisms, potentially influencing the performance of plant antagonists. READ MORE
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3. Nutrient distribution by mammalian herbivores in Hluhluwe-Imfolozi Park (South Africa)
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : African megaherbivores are ecosystem engineers, which are under threat of extinction caused by, among others, poaching and climate change. Their current rates of loss means that there’s a need to better analyse their impact on the environment, in order to predict the consequences of losing this group. READ MORE
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4. Shifts within the carbon cycle in response to the absence of keystone herbivore Ovibos moschatus in a high arctic mire
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : Tundra ecosystems are generally recognized as globally important carbon sinks, yet the knowledge on threats to such ecosystems is narrow. Climate change is predicted to reduce the number of muskox (Ovibos moschatus) in the arctic, it is therefore essential to understand the effect herbivores induce on the arctic ecosystem. READ MORE
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5. Herbivore pressure of reindeer, rodents and invertebrates in the Fennoscandian tundra: a comparison of three methods.
University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskapAbstract : Estimating herbivore density is an important part of understanding their impact on vegetation. Many studies have been carried out on the impact of reindeer and other herbivores on arctic and sub-arctic vegetation, but they are difficult to compare as they typically use different methods to estimate herbivore activities. READ MORE
