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Titolo:
Identification of dragonflies (Odonata) as indicators of general species richness in boreal forest lakes
Autore:
Sahlen, G; Ekestubbe, K;
Indirizzi:
Uppsala Univ, Evolutionary Biol Ctr, SE-75236 Uppsala, Sweden Uppsala Univ Uppsala Sweden SE-75236 Biol Ctr, SE-75236 Uppsala, Sweden
Titolo Testata:
BIODIVERSITY AND CONSERVATION
fascicolo: 5, volume: 10, anno: 2001,
pagine: 673 - 690
SICI:
0960-3115(200105)10:5<673:IOD(AI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOLOGICAL DIVERSITY; OCCURRENCE PATTERNS; NESTED SUBSETS; NATIONAL-PARK; CONSERVATION; BIODIVERSITY; ASSEMBLAGES; LANDSCAPE; HABITAT; EXTINCTION;
Keywords:
analysis of nestedness; dragonflies; empirical selection; indicator species definition; Odonata; Sweden;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Sahlen, G Uppsala Univ, Evolutionary Biol Ctr, Norbyvagen 18D, SE-75236 Uppsala, Sweden Uppsala Univ Norbyvagen 18D Uppsala Sweden SE-75236 ala, Sweden
Citazione:
G. Sahlen e K. Ekestubbe, "Identification of dragonflies (Odonata) as indicators of general species richness in boreal forest lakes", BIODIVERS C, 10(5), 2001, pp. 673-690

Abstract

We argue the need to select indicator species on empirical data to avoid influence of personal opinions. To test an empirical selection process basedon a nested subset matrix, we sampled partivoltine dragonfly larvae from 74 small lakes in central Sweden. A nestedness matrix was set up using the 'nestedness temperature calculator' program, selecting 11 species as potential indicators of species richness. These were tested against a known indicator species for water quality (the pool frog) and plant diversity through inventories and comparison to existing surveys of biological values ('rich' lakes vs. 'ordinary' lakes). We could only see a trend towards the pool frog occurring in dragonfly-rich lakes, but found a significant connection between the number of aquatic plants along the shore line and the number of dragonfly species present. A significantly higher number of indicators were encountered in lakes previously surveyed as 'rich' in plants than in lakes classified as 'ordinary'. Dragonfly species richness therefore appears to bepositively associated with species richness of vascular plants. We proposenestedness matrices to be a good selecting tool for indicator species, particularly in groups where the biology of the species is not well known. However, it is important to define what such indicators really indicate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/21 alle ore 12:42:27