1992. McIver, J.D., G.L. Parsons, and A.R. Moldenke. Litter spider succession after clearcutting in a western coniferous forest. Canad. J. For. Res. 22: 964-982.

ABSTRACT: The litter spiders of a coniferous forest in western Oregon were trapped in pitfalls to study the effects of, and recovery after, clearcutting. Traps were placed in oldgrowth sites (150-450 years) and in clearcuts of three different ages (4-7, 16-19, and 22-31 years); each age class was represented by sites that differed along a gradient of moisture availability. A total of 8905 individuals were collected over the 2 year study period, comprising 93 species, 54 genera, and 15 families. Visual pursuit hunting spiders dominated clearcuts, while "sit-and-wait" microweb and trapdoor spiders dominated mature forests. Most of the common forest species were reestablished in the wettest sites by 30 years after clearcutting; species composition in dry 30-year-old clearcuts more closely resembled the fauna of shrubby wet 16-year-old clearcuts. Microenvironmental conditions and the availability and species composition of prey are the most likely factors behind variation in spider species composition among sites. Prey and microenvironment are in turn largely influenced by canopy closure and litter depth. The use of litter spiders as bioindicators of litter habitat quality and forest recovery is discussed.

1990.   Litter spiders as bio-indicators of recovery after clear-cutting in a western coniferous forest. Northwest Env. J. 6:410-412. (McIver, J.D., A.R. Moldenke & G.L. Parsons).

1987. Moldenke, A.R., B.L. Fichter, W.P. Stephen, and C.E. Griswold. A key to arboreal spiders of Douglas-fir and true fir forests of the Pacific Northwest. USDA, PNW Research Station, PNW-GTR-207, 48 pp.

ABSTRACT: This illustrated key for identifying spiders inhabiting true fir and Douglas-fir is based on extensive collections from throughout the three North American Pacific Coast States.  Details of the age classes present at budburst and the season in which to expect adults are presented for all species. This paper is written for people unfamiliar as well as familiar with spider taxonomy; a glossary of all technical terms is included.  References to pertinent technical literature are also included.