Improved Funnel-Type Extractors for Soil Arthropods

Macfadyen, A.

doi:10.2307/2120

Cited by 454 publications

(170 citation statements)

References 3 publications

Supporting

Mentioning

160

Contrasting

Unclassified

Order By: Relevance

“…Two soil cores were collected inside each plot (50 cm from the border, one east, the other west) with a soil corer (ø 5.3 cm), only the upper 5 cm of organic layer was used for mesofauna extraction. The mobile soil mesofauna (Collembola, Oribatida, Gamasina, Uropodina) was extracted by heat using a modified high gradient extractor (Macfadyen, 1961) for 4 days. The specimens from the two samples per plot were pooled (n ¼ 8 per treatment).…”

Section: Sampling Designmentioning

confidence: 99%

Differential response of ants to nutrient addition in a tropical Brown Food Web

Jacquemin

Maraun

Roisin

et al. 2012

Soil Biology and Biochemistry

View full text Add to dashboard Cite

a b s t r a c tIn tropical ecosystems, access to nitrogen (N) and phosphorus (P) limits the decomposition rate of leaflitter. Leaf-litter ants are abundant in this microhabitat and present a wide variety of diets. Our aim was to study the response of various ant trophic groups to an increased nutrient availability which boosts the decomposition of their habitat and selectively affects the abundance of their prey.A 6-month nutrient addition experiment (CN, CNP) was performed in a tropical montane forest of the Ecuadorian Andes. The density of ants, of other predators (e.g. arachnids, beetles) and of their potential prey (mesofauna, ranging from 0.1 to 2 mm) was measured in treatments and control plots.The litter volume in fertilized plots decreased significantly. Collembola and total mesofauna density were enhanced by the CNP addition. Ants responded differentially according to their trophic group: despite increased prey availability, predatory species in general and collembolan hunters in particular were negatively affected by both treatments. Other ant trophic group densities did not change. By contrast, the density of Dermaptera increased with the treatments. A complementary isotopic approach allowed us to trace carbon fluxes through the food web.Our results suggest that the nutrient input enhanced the litter decomposition rate, leading to reduction of habitat size. They also suggest that predatory ants in tropical leaf-litter food webs are limited by habitat size rather than by prey availability, and that these ants are more affected by habitat loss than their prey, other ant trophic groups and other macrofauna taxa.

show abstract

Section: Sampling Designmentioning

confidence: 99%

Differential response of ants to nutrient addition in a tropical Brown Food Web

Jacquemin

Maraun

Roisin

et al. 2012

Soil Biology and Biochemistry

View full text Add to dashboard Cite

show abstract

“…Litter depth, litter pH, soil moisture and densities of springtails (Collembola) were determined from small forest floor samples (diameter of 5 cm), taken together with the larger samples for spider extraction. Collembolans were extracted by heat (Macfadyen 1961).…”

Section: Environmental Variablesmentioning

confidence: 99%

Communities of ground-living spiders in deciduous forests: Does tree species diversity matter?

et al. 2008

View full text Add to dashboard Cite

The relationships between species diversity and ecosystem functions are in the focus of recent ecological research. However, until now the influence of species diversity on ecosystem processes such as decomposition or mineral cycling is not well understood. In deciduous forests, spiders are an integral part of the forest floor food web. In the present study, patterns of spider diversity and community structure are related to diversity of deciduous forest stands in the Hainich National Park (Thuringia). In 2005, pitfall trapping and quantitative forest floor sampling were conducted in nine plots of forest stands with one (Diversity Level 1), three (DL 2) and five (DL 3) major deciduous tree species. Species richness, measured with both methods, as well as spider abundance in forest floor samples were highest in stands with medium diversity (DL 2) and lowest in pure beech stands (DL 1). The Shannon-Wiener index and spider numbers in pitfall traps decreased from DL 1 to DL 3, while the Shannon-Wiener index in forest floor samples increased in the opposite direction. Spider community composition differed more strongly between single plots than between diversity levels. Altogether, no general relationship between increasing tree species diversity and patterns of diversity and abundance in spider communities was found. It appears that there is a strong influence of single tree species dominating a forest stand and modifying structural habitat characteristics such as litter depth and herb cover which are important for ground-living spiders.

show abstract

“…The nematodes were sampled using a 1.8 cm diameter corer and were extracted using the Whitehead and Hemming's modification of the Baerman method (Whitehead & Hemming 1965). The mesofauna was sampled using a 3.5 cm diameter corer and were extracted using a modified Macfadyen high gradient canister (Macfadyen 1961) in the case of springtails and using the O'Connor modification of the Baerman funnel (O'Connor 1955) in the case of enchytraeids. The macrofauna was hand-sorted from 30 x 30 cm samples to a depth of 10 cm.…”

Section: Methodsmentioning

confidence: 99%

Testing Metabolic Theory of Ecology on the local scale: a preliminary study

Danyłow

Ulrich

Ilieva-Makulec³

et al. 2012

Ecological Questions

View full text Add to dashboard Cite

Abstract. Data on the density and the body mass of a single community of soil fauna were collected and metabolic rates were calculated from the literature data to test some predictions of the metabolic theory of ecology on the local scale. Part of the results are in accordance with the theory: power functions were found between the metabolic rate and the body mass, and between the density and the body mass. These two relationships have opposite exponents inducing that total population energy use is independent of the body mass. However, the exponents of the relationships were significantly different from the predicted values of |3/4|. The metabolic rate -body mass relationships yielded an exponent >0.8, while the density -body mass relationships yielded an exponent <-0.85. Our results indicate that the metabolic theory of ecology does not hold at the local level. Few studies have been carried out on the local scale and further analysis is required to validate this controversial but promising theory.

show abstract

Improved Funnel-Type Extractors for Soil Arthropods

Cited by 454 publications

References 3 publications

Differential response of ants to nutrient addition in a tropical Brown Food Web

Differential response of ants to nutrient addition in a tropical Brown Food Web

Communities of ground-living spiders in deciduous forests: Does tree species diversity matter?

Testing Metabolic Theory of Ecology on the local scale: a preliminary study

Contact Info

Product

Resources

About