Phenology and abundance of Enoicyla pusilla in conifer stands

  • M. J. Lombardero Departamento de Producción Vegetal. Universidad de Santiago de Compostela. Lugo.


Aim of Study. We study the abundance of Enoicyla pusilla (Burmeister) in pine plantations and the effects of silvicultural thinning on insect population. This species is considered a rare member of the order Trichoptera, reported as absent or occasional in conifer forests. It has been suggested that the proliferation of conifer plantations may be a threat for this species by favoring population isolation. 

Area of study. Plantations of native and non-native pines in Galicia (NW of Spain).

Material and Methods. We used different traps systems, including 28 pitfall traps, to compared populations of insects in 14 thinned and unthinned plots of Pinus pinaster and P. radiata distributed across 3 forest stands. Traps were checked every 15 days during one year.

Main results.  We caught 1.219 larvae of E. pusilla. It was the third most abundant species captured in pitfall traps. Larval activity extended from January to late July. They were more abundant in the stands of P. radiata, probably because the denser foliage produced limits sunlight and helped to maintain litter moisture. Additionally needles of P. radiata had lower toughness and higher nitrogen content, which probably makes it a higher quality resource for the detritivorous larvae. Thinning did not affect larvae population.

Research highlights: Although managed forests cannot match the biodiversity value of native mixed species stands, if managed appropriately, they may provide habitat for native fauna while also allowing for forest production

Key words: caddisfly; Pinus pinaster; Pinus radiate; plantations; thinning.


Download data is not yet available.

Author Biography

M. J. Lombardero, Departamento de Producción Vegetal. Universidad de Santiago de Compostela. Lugo.


Barbaro L, Pontcharraud L, Vetillard F, Guyon D, Jactel H, 2005. Comparative responses of bird, carabid, and spider assemblages to stand and landscape diversity in maritime pine plantation forests. Ecoscience 12: 110-121.

Brockerhoff EG, Berndt LA, Jactel H, 2005. Role of exotic pine forests in the conservation of the critically endangered New Zealand ground beetle Holcaspis brevicula (Coleoptera: Carabidae). N Z J Ecol 29: 37-43.

Drift J van der, Witkamp M, 1959. The significance of the breakdown of oak litter by Enoicyla pusilla Burm. Arch Neerl Zool 13: 486-492.

Gonzalez- Gonzalez MA, Martínez-Menéndez J, 2011. Checklist of the caddisflies of the Iberian Peninsula and Balearic Islands (Trichoptera). Proceedings 13th International Symposium on Trichoptera 5: 115-135.

González MA, Valiela M, Cobo F, 1989. Observaciones sobre los Tricópteros de la Península Ibérica. VIII: Sierras de Ancares y del Caurel (Noroeste de Espa-a) (Trichoptera). Boletín Asoc esp Entom 13: 331-341.

Harding DJL, 1995. Land register for a caddis larva? Antenna 10:18-20.

Harding DJL, 1998. Distribution and population dynamics of a litter-dwelling caddis, Enoicyla pusilla (Trichoptera). Appl Soil Ecol 9: 203-208.

Kelner-Pillault S, 1960. Biologie, écologie d'Enoicyla pusilla Burm. (Trichopteres Limnophilides). Ann Biol 36: 51-99.

Kelner-Pillault S, 1975. Attirance sexuelle chez un Trichoptere: Enoicyla pusilla Burmeister. Bull Soc Entomol Fr 80: 252-257.

Kuuluvainen T, Pukkala T, 1987. Effect of Crown Shape and Tree Distribution on the Spatial-Distribution of Shade. Agric. For. Meteorol. 40: 215-231.

Lombardero, MJ, Alonso-Rodríguez, M, Roca-Posada, EP, 2012. Tree insects and pathogens display opposite tendencies to attack native vs. non-native pines. Forest Ecology and Management 281:121-129.

Martínez-Cortizas, A, Pérez-Alberti, A, 1999. Atlas Climático de Galicia. Consellería de Medio Ambiente, Xunta de Galicia, Santiago de Compostela, Spain. PMid:10320369

Masselot G, Dortel F, 2004. Un "porte-bois" terrestre: Enoicyla pusilla Burmeister, 1839) (Trichoptère Limnephilidé). Insects 23 (134).

Molles M, Graça MAS, 2000. Leaf toughness and nitrogen content: Common currencies determining decomposition rate and performance of terrestrial detritivores?. Abstracts of 85th Annual Meeting of Ecological Society of America. MAN-3-48-18.

Mey W, 1983. Die terrestrischen Larven der Gattung Enoicyla Rambur in Mitteleuropa und ihre Verbreitung. Dt Entom Z N F 30 (1-3): 115-122.

Nahmani J, Lavelle P, Rossi JP, 2006. Does changing the taxonomical resolution alter the value of soil macroinvertebrates as bioindicators of metal pollution? Soil Biol Biochem 38: 385-396.

Ocharan R, Ocharan FJ, Anadón A, 2006. Tricópteros de la Reserva de la Biosfera de Muniellos y de Asturias (N de Espa-a). Boln Asoc esp Ent, 30 (1-2): 161-197.

Packham JR, Harding DJL, Hilton GM, Stuttard RA, 1992. Functional Ecology of Woodland and Forests. Chapman and Hall.

Rathjen W, 1939. Experimentelle Untersuchungen zur Biologie und Okologie von Enoicyla pusilla Burm. Z Morph Okol Tiere 35: 14-83.

Vieira-Lanero R. 2000. Las larvas de los Tricópteros de Galicia (Insecta: Trichoptera).Tesis Doctoral, Universidad de Santiago de Compostela, Santiago de Compostela, Spain. 611 pp.

Wolters V, 2000. Invertebrate control of soil organic matter stability. Biol Fertility Soils 31: 1-19.

How to Cite
LombarderoM. J. (2013). Phenology and abundance of Enoicyla pusilla in conifer stands. Forest Systems, 22(2), 255-258.
Short communications