Species richness of herbaceous vegetation was increased by the presence of trees with an average of three more species under tree cover. Mowing and weed control also had an effect on the species richness and composition of the herbaceous vegetation component, which subsequently influenced invertebrate order composition.
Planted tree genera had a significant influence on the ordinal richness and abundance of invertebrates. Acacia species supported significantly greater abundances of invertebrates and were among the most Invertebrate order rich of the tree genera sampled.
Eucalyptus camaldulensis was the most widely planted species, present in all but one planting and was one of the standout performers for growth. The health of Eucalyptus melliodora was consistently high across the valley while Eucalyptus populnea was always ranked among the poor performing species.
The research concluded that revegetation activities on cotton farms have the potential to contribute significantly to biodiversity conservation in the Namoi Valley.
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