Freshwater macroinvertebrates provide a useful and reliable indicator of the health of our rivers, streams, ponds and wetlands. As environmental awareness within the community increases, there is an increasing interest in the need to assess the health of our local waterways and school curriculums are changing to reflect this important ecological trend.
The Waterbug Book provides a comprehensive and accurate identification guide for both professionals and non-professionals. It contains an easy-to-use key to all the macroinvertebrate groups and, for the first time, high quality colour photographs of live specimens. It provides a wealth of basic information on the biology of macroinvertebrates, and describes the SIGNAL method for assessing river health. The Waterbug Book is full of practical tips about where to find various animals, and what their presence can tell about their environment.
Winner of the 2003 Eureka Science Book Prize and the 2003 Whitley Medal.
With climate change set to increase the frequency and severity of drought in many parts of the world, there is a need to better understand the effects of drying on stream ecosystems. We investigated the long-term effects of drought on two amphipod taxa Paramoera fontana (Pontogeneiidae) and Austrogammarus australis (Paramelitidae) and macroinvertebrate assemblage structure through an analysis of 13 years of data collected from four forested stream reaches (Victoria, Australia). Abundances of A. australis and P. fontana in the lower reach of Lyrebird Creek declined to zero following surficial streambed drying. Similar declines in abundances were not observed in Sassafras Creek or the two headwater springs, which continued to flow throughout the drought. P. fontana was detected again in the lower reach of Lyrebird Creek 12 months after the final cease-to-flow, however A. australis remained undetected 5 years later, despite an upstream source population within 2 km. Both the entire and shredder macroinvertebrate assemblage structure in Sassafras Creek and the lower reach of Lyrebird Creek shifted significantly pre-and post-surficial streambed drying in the lower reach of Lyrebird Creek. Despite signs of recovery following a return to more average flows, assemblage composition remained considerably different. The substantial differences in the recovery of the two species indicates varying resistance and resilience traits. The failure of A. australis to recolonize after 5 years indicates an absence of any significant resistance or resilience traits. In contrast, the rapid re-colonization of P. fontana may indicate poor resistance traits, but strong resilience traits. The sensitivity of A. australis to cease-to-flow events points to the need to carefully manage water extraction to protect this threatened species. The effective management of macroinvertebrate assemblages in the face of drought requires a clear understanding of their response to drying, the conservation of refugia and the minimization of additional stressors which reduce ecosystem resilience.
The second and third larval instars of the Australian endemic dytiscid Chostonectes nebulosus (Macleay, 1871) are described and illustrated for the first time including a detailed chaetotaxic analysis of head capsule and appendages, legs, last abdominal segment and urogomphi. Collected larvae were successfully associated with adults using rearing and a molecular approach. The identification key and COI barcodes for C. nebulosus, C. gigas (Boheman, 1858) and C. johnsonii (Clark, 1862) are provided.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.