Small stonefly predators affect microbenthic and meiobenthic communities in stream leaf packs

2015 ◽  
Vol 60 (9) ◽  
pp. 1930-1943 ◽  
Author(s):  
Nabil Majdi ◽  
Walter Traunspurger ◽  
John S. Richardson ◽  
Antoine Lecerf
Keyword(s):  
Leaf Packs

Method for Incubating Leaf Tissue to Study Decomposition in Streams

1978 ◽  
Vol 35 (2) ◽  
pp. 247-248 ◽  
Author(s):  
D. C. Eidt ◽  
J. H. Meating
Keyword(s):  
Leaf Tissue ◽  
Severe Winter ◽  
Winter Conditions ◽  
Leaf Packs ◽  
Mesh Bags ◽  
Black Plastic

Discs of leaf tissue in mesh bags were incubated inside black plastic tubes secured to the stream bottom. The method minimizes losses of samples due to severe winter conditions and is easier to use than leaf packs or decomposition boxes.

Interspecific Associations in a Woodland Stream

1981 ◽  
Vol 38 (10) ◽  
pp. 1271-1280 ◽  
Author(s):  
Seth R. Reice
Keyword(s):  
Community Structure ◽  
Benthic Macroinvertebrates ◽  
Community Organization ◽  
Common Species ◽  
Interspecific Association ◽  
Chi Square ◽  
Leaf Pack ◽  
Leaf Packs ◽  
Species Pairs ◽  
Associated Species

Patterns of association of benthic macroinvertebrates were examined within a riffle of New Hope Creek, North Carolina, USA. The 16 most common species were tested for cooccurrences. Chi-square contingency tests on simultaneous presence and absence of two species at a time were performed. The strength of the association and its direction were determined for significantly associated species pairs using the V statistic. The patterns of association among 120 species pairs are presented for each of three mineral substrate types (cobbles, pebbles, and gravel) and leaf packs (5 g of Cornus florida leaves) attached to them. These data were collected over a 3-mo period.The results show that significant interspecific association on a given substrate was found for 18.3% or less of the species pairs. The species which strongly associated on one substrate type differed from those associating on another substrate. The presence or absence of leaf packs on a mineral substrate patch, which did not affect most species densities, did affect the cooccurrence patterns among species. The presence of leaf packs reduced the number of significantly associated species pairs on all substrates. In all cases in mineral substrates, negative associations were rare. The proportion of negative associations approximated what one would predict by chance alone. This suggests that competition may not be an important factor in stream communities.This work presents a different approach to the analysis of lotic communities. It suggests several hypotheses about community structure in streams. It reaffirms that substratum type is a major governing factor in stream community structure and dynamics.Key words: benthic macroinvertebrates, community organization, competition, interspecific association, leaf pack, patchiness, predation, stream, substrate

scholarly journals Nectopsycheof Ecuador: a new species from the high Andean páramo and redescription ofNectopsyche spiloma(Ross) (Trichoptera: Leptoceridae)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4981
Author(s):  
Ralph W. Holzenthal ◽  
Blanca Rios-Touma
Keyword(s):  
New Species ◽  
Adult Male ◽  
Larval Stage ◽  
Male And Female ◽  
Late Afternoon ◽  
Leaf Packs ◽  
Sampling Program ◽  
A New Species

The male and female of a new species of long-horned caddisfly,Nectopsyche paramo, are described from the high Andes of Ecuador. The new species was found above 4,000 m, representing the highest recorded elevation for a species in the genus. The larval stage of the species is also described. Only a total of 13 larvae were collected during a 17-month sampling program and 11 adults, suggesting that the species is rare. Larvae were found mainly in leaf packs. A male and female were observed in a mating swarm ca. 3 m above a stream during late afternoon. In addition, we redescribe the adult male ofNectopsyche spiloma (Ross), previously known from Ecuador from unsubstantiated literature records.

A new species of Atopophlebia Flowers (Ephemeroptera: Leptophlebiidae) from western Ecuador with ecological and biogeographic notes on the genus

Zootaxa ◽  
2012 ◽  
Vol 3478 (1) ◽  
pp. 11-18 ◽  
Author(s):  
R. WILLS FLOWERS
Keyword(s):  
New Species ◽  
Central America ◽  
Dry Season ◽  
Leaf Packs ◽  
Small Streams ◽  
Accreted Terranes ◽  
A New Species

Atopophlebia pitculya is described from adults and nymphs from western Ecuador. Nymphs were found in leaf packs in small streams that can be intermittent in the dry season. This species along with Atopophlebia fortunensis are found associated with the accreted terranes of Central America, the Western Andes of Colombia, and the coastal mountains in northwestern Ecuador.

Accumulation Dynamics of Triclopyr Ester in Aquatic Leaf Packs and Effects on Detritivorous Insects

1998 ◽  
Vol 27 (5) ◽  
pp. 1138-1147 ◽  
Author(s):  
David P. Kreutzweiser ◽  
Dean G. Thompson ◽  
Bozena Staznik ◽  
Janelle A. Shepherd
Keyword(s):  
Leaf Packs

Loss of ash trees in riparian forests from emerald ash borer infestations has implications for aquatic invertebrate leaf-litter consumers

2019 ◽  
Vol 49 (2) ◽  
pp. 134-144 ◽  
Author(s):  
David Kreutzweiser ◽  
David Nisbet ◽  
Paul Sibley ◽  
Taylor Scarr
Keyword(s):  
Organic Matter ◽  
Leaf Litter ◽  
Food Source ◽  
Emerald Ash Borer ◽  
Riparian Forests ◽  
Aquatic Invertebrate ◽  
High Quality ◽  
Invertebrate Communities ◽  
Leaf Packs ◽  
Ash Trees

Rapid loss of ash (Fraxinus spp.) trees in riparian forests from an invasive insect, the emerald ash borer (EAB; Agrilus planipennis Fairmaire, 1888), could pose risk of altering organic matter inputs to water bodies that underpin many aquatic ecosystem processes. We measured the composition of riparian forests and their leaf-litter contributions to headwater streams and determined the relative palatability of ash leaves and leaves of three other common riparian trees to aquatic invertebrate leaf-litter consumers (the stonefly (Pteronarcys sp.) and the cranefly (Tipula sp.)) in laboratory microcosms and whole invertebrate communities in forest streams. Ash trees contributed, on average, 24% to riparian tree density and 20% to total litterfall. Among the four common streamside trees accounting for 65% of total litterfall, ash was the first or second most preferred food source for consumers. Leaf packs without ash decomposed at slower rates than packs containing 25%–100% ash leaves. Preferential feeding on ash leaves infers a high-quality food source selected by consumers, and this concurred with comparatively high N content and low C–N ratio of ash leaves. Aquatic invertebrate communities on leaf packs in streams differed among leaf mixtures with or without ash, although community dissimilarity was low. The loss of ash in riparian forests represents an EAB-induced reduction in a high-quality resource subsidy to organic matter consumers in streams. We discuss how this has implications for risk predictions and management response strategies.

The Effects of Varying Current on Weight Loss from Willow Leaf Packs

1990 ◽  
Vol 5 (4) ◽  
pp. 413-415 ◽  
Author(s):  
Steven P. Canton ◽  
Robert J. Martinson
Keyword(s):  
Weight Loss ◽  
Leaf Packs
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