Toxicity and habitat degradation will reduce numbers. A healthy community will have a balance between the various trophic groups. A healthy community will have a balanced composition between taxa, with more than 2 dominant groups. Rise Taxa Richness Diversity Diversity is a measure of community complexity, responds adversely to stress intensity. Diversity Healthy systems have greater numbers of sensitive taxa and predator-guild organisms.
Impacted systems have higher tolerant to intolerant organism ratios.
Rise Family Biotic Index Community health Community's averaged tolerance value will rise with increasing stressors. Decline Community Trophic Similarity Index Similarity to reference condition Resemblance of trophic pattern to reference will shift with stressors. Overall community condition will decline with increasing degradation. Decline Saltmarsh invertebrate community metrics and indices. Nutrient enrichment will usually support higher numbers of organisms.