A novel landscape ecology approach for determining microhabitat correlations and faunal patchiness in extreme environments:pilot study for the Southern East Pacific Rise at 17-18° S
Since their discovery in 1977, hydrothermal vent communities have offered scientists
a unique glimpse into a world that is supported primarily by chemically derived
energy rather than direct energy from the sun. Furthermore, studies of hydrothermal
vent ecosystems have introduced scientists to amazing animals that have successfully
adapted to living in extreme environments. Although much has been learned about
the life histories of vent organisms, due to the difficulty and expense of performing
large scale (spatial and temporal) studies at deep sea hydrothermal vent sites, our
knowledge of vent faunal dynamics is largely based on observational studies that
often lack the support of sound statistical analysis. Furthermore, data sets can be
discordant in space and time, making it difficult to piece together the potentially
complex life histories of vent animals. The main goal of this report is to study the
applicability of point pattern analysis, a simple spatial statistical method based on
principles of landscape ecology, for characterizing the distributions of organisms at
hydrothermal vent sites.
The study began as a pilot project, and has focused on an existing high resolution,
remotely sensed, data set from the superfast-spreading southern East Pacific Rise at
17-18° South (Figure 1). It was accomplished through an integration of remote
sensing technology, landscape ecology principles, and geographic information
science