A study on vineyards biocenose in northern Algria.

Systematic Monitoring was carriedin a vineyard in Mitija, Algeria,during an annual cycle. Monthly sampling conducted bydifferent techniques were performed in different seasons in order to estimatethe vineyard biocenose. Analysis of the data showedsignificant diversity of species of invertebrates including arthropods, especially insects. This fauna is composed of 7540 individuals, distributed over 13 orders, 29 families and 47 species. As for the seasonal evolution of the wine biocenose, it wasrelatively highand diversified during the spring, and composed mainly of phytophagous-opophages and predators.The prevalence and changes in abundance of different functional groups appeared to bedependent on the phenological changes that occuredin the plant from March until June.Thesynchronous presence of phytophagous-opophages with their predatorswas noted. Parasitoids were observed starting from the autumn period.As for the evolution of the functional groupswith the seasons, two groupswere revealed, the first was formed essentially throughphytophagous, predators and all opophages responding to aspring and summer season,and the second group of boringinsects; whereasparasitoids werereported after the autumn period and at the beginning of winter.