Predicting Regional Patterns of Similarity in Species Composition for Conservation Planning

摘要: : In a review of recent challenges in conservation planning, Ferrier (2002) proposed the incorporation models similarity species composition as means for prioritizing areas biodiversity conservation. A key assumption this approach is that estimates compositional derived from can be used effective surrogates real data. We data on snail distribution Israel to test assumption. two types analyze patterns composition: one based presence/absence and second abundance Both accounted large amounts observed variation similarity. Variation-partitioning analysis indicated considerable amount could separated into “pure” geographical versus environmental components, indicating reserve selection procedures should take account spatial considerations determining priorities The relative effects factors varied between models, different indices if wishes represent per se or ecological communities including their abundances. comparison land snails birds subset study sites revealed high degree congruence groups. Moreover, was better predictor compared with all distances taken together. Models calibrated collected small plots explained at larger scales, suggesting sampling efforts required planning might lower (and thus, more feasible) than assumed previously. may serve an important tool planning. Resumen: En una revision de los recientes retos la planificacion conservacion, propuso incorporacion modelos similitud en composicion especies como manera priorizar para conservacion biodiversidad. Una suposicion clave este metodo es que pueden utilizar las estimaciones derivadas sustitutos efectivos datos reales similitud. Utilizamos distribucion caracoles terrestres probar esta suposicion. dos tipos modelo analizar patrones especies: uno con base presencia/ausencia y el segundo abundancia. Ambos explicaron gran parte variacion observada composicion. El analisis particion indico podia separarse componentes geograficos “puros” ambientales “puros,” lo indica procedimientos seleccion reservas deberian tener cuenta consideraciones espaciales determinacion prioridades conservacion. Los efectos relativos factores variaron entre estos modelo, diferentes si desea representar o comunidades ecologicas incluyendo abundancia relativa especies. La comparacion aves un subconjunto sitios estudio revelo alto grado congruencia grupos. Mas aun, fue mejor pronosticador todas distancias geograficas juntas. calibrados recolectados parcelas pequenas cantidad mayores escalas, sugiere esfuerzo muestreo requerido puede ser menor (y por tanto, mas factibles) al asumido previamente. herramienta importante