Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: trophic group

Sortuj według:

Ogranicz wyniki do:

Linia wody – szczególne miejsce arenalu południowego Bałtyku dla wolnożyjących nicieni

Taberska A., Rokicka-Praxmajer J.

Inżynieria Ekologiczna

2018

Vol. 19, nr 1

9--18

Praca przedstawia charakterystykę strukturalną i funkcjonalną zespołów nematofauny, zasiedlających osady na linii wody w południowym Bałtyku. Wolnożyjące nicienie oznaczono do rodzaju oraz określono ich strukturę troficzną. Zagęszczenie nematofauny na badanych stanowiskach wahało się od 10,52 ± 9,82 osob./10 cm2 do 124,49 ± 76,39 osob./10 cm2. Najliczniej występowały nicienie z rodzaju Ascolaimus, stanowiąc od ok. 45% do 74% całkowitej liczebności nematofauny. Łącznie w okresie badań stwierdzono nematofaunę należącą do 7 rodzajów. Za zasadniczy element nematofauny zasiedlającej osady na linii wody uznano nicienie z rodzajów: Ascolaimus, Axonolaimus, Enoplolaimus i Daptonema. Pod względem funkcjonalnym dominowali nieselektywni osadożercy, osobniki z nieuzbrojoną torebką gębową, reprezentowane przez nicienie z rodzajów: Ascolaimus, Axonolaimus, Theristus i Daptonema.

This paper presents the structural and functional characteristics of nematofauna assemblages inhabiting the sediments along the water line in the southern Baltic Sea. The nematodes were identified to the genus level and assigned to appropriate trophic group. The density of free-living nematoda varied from 10.52 ± 9.82 ind./10 cm2 to 124.49 ± 76.39 ind./10 cm2. Ascolaimus was the most abundantly represented genus, accounting for from 45% to 74% of the total number of nematofauna. A total of 7 nematode genera were identified. Ascolaimus, Axonolaimus, Enoplolaimus and Daptonema were considered essential elements of nematofauna. In terms of functionality, non-selective deposit feeders were predominant, individuals with unarmed buccal cavity, represented by nematodes of the genera Ascolaimus, Axonolaimus, Theristus and Daptonema.

Ground-Active Arthropod Recovery in Response to Size of Shrub Plantations in a Desertified Grassland Ecosystem

Liu R., Liu J., Zhao J., Xi W., Yang Z.

Polish Journal of Ecology

2017

Vol. 65, nr 3

410--422

The ground-active arthropod diversity response to size of shrub plantations in desertified grassland ecosystems is largely unknown. In the study ground-active arthropods were collected by pitfall trapping beneath shrub canopy of very low, low, medium and high size, with adjacent mobile sandy land as a control. It was found that arthropod dominant taxa from mobile sandy land were significantly distinctive from those from plantations of different shrub size. A considerably lower Sørensen index (i.e., 0.25-0.48) was found between the arthropod communities from mobile sandy land and the canopy of either shrub size, than between those under low and medium/high shrub size (i.e., 0.62 to 0.69). The arthropod total abundance was significantly greater under the shrub canopy of very low size in comparison to that of low and medium shrub size and mobile sandy land, with the intermediate values under shrub canopy of high shrub size. Taxon richness and diversity of arthropod communities were distinctly lower under the shrub canopy of low size in comparison to very low, medium and high shrub size. The shrub size was found to have different effects on the density and richness distribution of arthropod trophic groups (i.e., predators, phytophagous, saprophagous, and omnivorous). It was concluded that shrub plantations could facilitate ground-active arthropod diversity recovery when they were afforested in mobile sandy land. There was a contrasting effect of shrub size on ground-active arthropod diversity recovery versus arthropod abundance when grazing was excluded.