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Water mites are among the most diverse and abundant groups of benthic macroinvertebrates in the world. With more than 7,500 described species, water mites are known to occur in nearly every known lentic and lotic freshwater environment. In addition, water mites occupy an unusual niche within benthic macroinvertebrate communities as their larvae are parasitic on various invertebrates as hosts. However, despite their relative diversity, abundance, and trophic position, water mites are widely neglected in aquatic biomonitoring assessments. In fact, in most bioassessment protocols water mites are either ignored completely or identified collectively as "Hydrachnidia" or "Hydracarjna", an artificial grouping of several water mite superfamilies. Constraints that may contribute to this widespread neglect include knowledge gaps in basic water mite biology, taxonomy, distribution, and conceptions that water mites are difficult to sample and identify. During this project, I aim to fill these knowledge gaps by identifying lotic water mite communities in central Pennsylvania and determine if and how these assemblages reflect water quality conditions. By sampling 26 sites along polluted and unpolluted, high-quality streams and collecting over 5,000 individual benthic macroinvertebrates and nearly 15,000 water mites, I 1) develop a standardized, quantitative sampling scheme for water mites for biomonitoring purposes, 2) inventory lotic water mite taxa in central Pennsylvania, 3) compare water mite community changes between polluted and unpolluted streams, and 4) document seasonal changes in water mite assemblages. By completing these objectives, I expand our understanding of this unique group of animals and build support for including them in future bioassessment studies.
"The third edition of Ecology and Classification of North American Freshwater Invertebrates continues the tradition of in-depth coverage of the biology, ecology, phylogeny, and identification of freshwater invertebrates from the USA and Canada. This text serves as an authoritative single source for a broad coverage of the anatomy, physiology, ecology, and phylogeny of all major groups of invertebrates in inland waters of North America, north of Mexico." --Book Jacket.
Algae are an important component of aquatic benthic ecosystems because they reflect the health of their environment through their density, abundance, and diversity. This comprehensive and authoritative text is divided into three sections to offer complete coverage of the discussion in this field. The first section introduces the locations of benthic algae in different ecosystems, like streams, large rivers, lakes, and other aquatic habitats. The second section is devoted to the various factors, both biotic and abiotic, that affect benthic freshwater algae. The final section of the book focuses on the role played by algae in a variety of complex freshwater ecosystems. As concern over environmental health escalates, the keystone and pivotal role played by algae is becoming more apparent. This volume in the Aquatic Ecology Series represents an important compilation of the latest research on the crucial niche occupied by algae in aquatic ecosystems. Presents algae as the important player in relation to environmental health Prepared by leading authorities in the field Includes comprehensive treatment of the functions of benthic algae as well as the factors that affect these important aquatic organisms Acts as an important reference for anyone interested in understanding and managing freshwater ecosystems
Readers familiar with the first three editions of Ecology and Classification of North American Freshwater Invertebrates (edited by J.H. Thorp and A.P. Covich) will welcome the comprehensive revision and expansion of that trusted professional reference manual and educational textbook from a single North American tome into a developing multi-volume series covering inland water invertebrates of the world. The series entitled Thorp and Covich’s Freshwater Invertebrates (edited by J.H. Thorp) begins with the current Volume I: Ecology and General Biology (edited by J.H. Thorp and D.C. Rogers), which is designed as a companion volume for the remaining books in the series. Those following volumes provide taxonomic coverage for specific zoogeographic regions of the world, starting with Keys to Nearctic Fauna (Vol. II) and Keys to Palaearctic Fauna (Vol. III). Volume I maintains the ecological and general biological focus of the previous editions but now expands coverage globally in all chapters, includes more taxonomic groups (e.g., chapters on individual insect orders), and covers additional functional topics such as invasive species, economic impacts, and functional ecology. As in previous editions, the 4th edition of Ecology and Classification of North American Freshwater Invertebrates is designed for use by professionals in universities, government agencies, and private companies as well as by undergraduate and graduate students. Global coverage of aquatic invertebrate ecology Discussions on invertebrate ecology, phylogeny, and general biology written by international experts for each group Separate chapters on invasive species and economic impacts and uses of invertebrates Eight additional chapters on insect orders and a chapter on freshwater millipedes Four new chapters on collecting and culturing techniques, ecology of invasive species, economic impacts, and ecological function of invertebrates Overall expansion of ecology and general biology and a shift of the even more detailed taxonomic keys to other volumes in the projected 9-volume series Identification keys to lower taxonomic levels