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Using Presence-Absence Data on Areal Units to Model the Ranges and Range Shifts of Select South African Bird Species
The study of where species occur is an important concern in ecology. Over the last decade, the occupancy model has been the primary tool used in attempts to answer where, when and why species occur where they do. In this dissertation, the occupancy model is improved upon by adding a spatial component to account for similarities ...
Understory Light Availability and Spatial Variation
Photosynthetically active radiation is a critical resource for understory plants and its availability and heterogeneity plays a major role in seedling regeneration and survival. This thesis examines various methods to quantify understory light availability, temporal dynamics and spatial variation in a shaded environment. ...