Artículo
Massive spider web aggregations in South American grasslands after flooding
Piacentini, Luis Norberto
; Grismado, Cristian José
; Aisenberg, Anita; Toscano Gadea, Carlos A.; Laborda, Alvaro; Simó, Miguel; Postiglioni, Rodrigo; Peralta, Luciano
; Proud, Dan N.; Ramirez, Martin Javier
Fecha de publicación:
08/2021
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Ecological Entomology
ISSN:
0307-6946
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
1. Major floods of riparian and grassland habitats may lead to a shift in the availability of resources (e.g., food, space) that produces cascading effects on the organisms that rely on it. After flooding occurs, particularly in natural grasslands or agricultural fields, massive aggregative spider webs are occasionally observed. However, given it is an infrequent and unpredictable event, it is seldom reported in detail. 2. We characterise two instances of massive web aggregations that followed major floods in grasslands and agricultural fields in Argentina and Uruguay in 2015. In the Argentinean event, we compare the composition of spider assemblages on the webs, in grasses below the webs, and in grasses from nearby habitats, with samples taken in the same location but when the fields were not flooded. 3. The assemblage of spiders in the massive web aggregations largely consisted of immature Diapontia uruguayensis (Lycosidae). In the grass below the webs, we recorded an impressive density of 1007 specimens m−1 belonging to several spider species, 6–15 times the density of similar samples without aggregated webs, co-occurring and showing low levels of aggression among them. 4. Our observations and review of the literature support the idea massive webs produced by lycosids are a byproduct of an unusually high density of spiders simultaneously attempting to disperse through the air via ballooning and escaping from floods.
Palabras clave:
ARANEAE
,
BALLOONING
,
DISPERSAL BEHAVIOR
,
RIPARIAN HABITATS
,
SILK
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Piacentini, Luis Norberto; Grismado, Cristian José; Aisenberg, Anita; Toscano Gadea, Carlos A.; Laborda, Alvaro; et al.; Massive spider web aggregations in South American grasslands after flooding; Wiley Blackwell Publishing, Inc; Ecological Entomology; 46; 6; 8-2021; 1333-1341
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