gradient analysis

Indicator species for the interpretation of vegetation condition in the St Bathans area, central Otago, New Zealand

Monitoring the effect of management in rangelands is an integral part of the process of adaptive management. An understanding of how individual species react to management has two major benefits. Firstly, monitoring, can be simplified by avoiding species which are reacting mostly to other influences, and secondly the abundance of species can be interpreted in a meaningful way for assessing the influence of previous management.

Empirical Measurement of Environmental Gradients in Ecological Surveys

Soil temperature, soil moisture and soil fertility were determined empirically at 63 predominantly hill sites in the South Island, New Zealand. Soil temperatures were measured at a depth of 0.5 m in four seasons and gave a standard deviation of mean annual temperature between sites of 2.2-degrees-C. Soil moisture levels, as available water in a 0-0.5 m profile, measured seasonally, gave a standard deviation between sites of 49 mm water.