damselfly species zygoptera, odonata found at the banks of the palancia river, a mediterranean mountain river in valencia region

agricultural agriculture alt anisopteran aquatic arthropoda biodiversity bioindicator carnivorous castello change chemicals climate communities community compound damselflies damselfly decline dragonfly eastern ecology entomologist entomology environment environmental extinction eyes habitat indicator insect insecta insects intensification intensive invertebrates loss losses mediterranean mountain odonata odonate order palancia pesticides pollution protodonata province pterostigma quality region river rivers semi spain species streams threat toxicity valencia valencian warriorfly water zygoptera