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Arthropod diversity in necrotic tissue of three species of columnar cacti (Cactaceae)

  • Sergio Castrezana (a1) and Therese Ann Markow (a1)


We compared the insect and arachnid species found in spring and summer samples of necrotic tissue of three species of columnar cacti, cardón [Pachycereus pringlei (S. Watson) Britten and Rose], organ-pipe (Stenocereus thurberi Buxb.), and senita [Lophocereus schottii (Engelm.) Britten and Rose] (all Cactaceae), endemic to the Sonoran Desert of North America. A total of 9380 arthropods belonging to 34 species, 23 families, 10 orders, and 2 classes were collected in 36 samples. Arthropod communities differed in composition among host cacti, as well as between seasons. These differences may be a function of variation in host characteristics, such as chemical composition and abiotic factors, such as water content or temperature.

Nous comparons les espèces d’insectes et d’arachnides trouvées au printemps et à l’été dans des échantillons de tissus nécrotiques de trois espèces de cactus colonnaires, le cardón [Pachycereus pringlei (S. Watson) Britten et Rose], le « tuyau d’orgue » (Stenocereus thurberi Buxb.) et la senita [Lophocereus schottii (Engelm.) Britten et Rose], trois cactacées endémiques du désert de Sonora en Amérique du Nord. Au total, 9380 arthropodes appartenant à 34 espèces, 23 familles, 10 ordres et 2 classes ont été récoltés dans 36 échantillons. Les communautés d’arthropodes diffèrent par leur composition chez les trois espèces hôtes et varient d’une saison à l’autre. Ces différences sont sans doute fonction des variations des caractéristiques de l’hôte, telles la composition chimique et les facteurs abiotiques comme le contenu hydrique et la température.

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