Generally speaking, warm tropical ecosystems are richer in species than cold temperate ecosystems at high latitudes. A similar pattern is seen for higher taxonomic groups (genera, families). Various h...Generally speaking, warm tropical ecosystems are richer in species than cold temperate ecosystems at high latitudes. A similar pattern is seen for higher taxonomic groups (genera, families). Various hypotheses (e.g., environmental patchiness, solar energy, productivity) have been raised to explain these patterns.
