The influence of substrate quality and stream size on wood decomposition dynamics

Oecologia ◽  
1983 ◽  
Vol 58 (3) ◽  
pp. 281-285 ◽  
Author(s):  
Jerry M. Melillo ◽  
Robert J. Naiman ◽  
John D. Aber ◽  
Keith N. Eshleman
Keyword(s):  
Wood Decomposition ◽  
Substrate Quality ◽  
Decomposition Dynamics ◽  
Stream Size ◽  
Influence Of Substrate

MBE-growth of CdTe on GaSb substrates: A case study on the influence of substrate quality

2018 ◽  
Vol 214 ◽  
pp. 285-290
Author(s):  
I. Madni ◽  
W. Lei ◽  
Y.L. Ren ◽  
J. Antoszewski ◽  
L. Faraone
Keyword(s):  
Mbe Growth ◽  
Substrate Quality ◽  
Influence Of Substrate

Influence of substrate on the body-waving behaviour of nematodes

Nematology ◽  
2009 ◽  
Vol 11 (6) ◽  
pp. 917-925 ◽  
Author(s):  
Laura M. Kruitbos ◽  
Stuart Heritage ◽  
Simona Hapca ◽  
Michael J. Wilson
Keyword(s):  
Leaf Litter ◽  
Galleria Mellonella ◽  
Sandy Loam ◽  
Body Wave ◽  
The Body ◽  
Steinernema Carpocapsae ◽  
Susceptible Host ◽  
Substrate Quality ◽  
C Elegans ◽  
Influence Of Substrate

Abstract The soil-dwelling nematodes Steinernema carpocapsae, S. scapterisci, S. feltiae, S. glaseri, Heterorhabditis bacteriophora, H. megidis, Phasmarhabditis hermaphrodita and Caenorhabditis elegans were placed on agar plates each containing four substrates (peat, sand, sandy loam and leaf litter). The body-waving behaviour of infective juveniles was recorded over a 10-day period in the presence or absence of an insect, Galleria mellonella, a susceptible host of some species. Body-waving behaviour differed amongst species and varied significantly in relation to substrate, time and the presence of G. mellonella. Steinernema carpocapsae showed body-waving behaviour more than other species and this tendency increased significantly with time. More S. carpocapsae were seen body waving on peat and leaf litter than on either sandy loam or sand. Conversely, sand promoted body waving in S. scapterisci. Body waving by C. elegans was more common on peat than on any of the other substrates. Heterorhabditis megidis, not previously known to body wave, did so in low numbers on peat and sandy loam. The remaining four species did not body wave. Previous work has shown that the presence of S. glaseri increases body waving by S. carpocapsae. We investigated whether substrate influenced this interaction and also included S. scapterisci in the study. The presence of S. glaseri significantly altered rates of body waving in S. carpocapsae and S. scapterisci in a way that was substrate-dependent. Our data suggest that body-waving behaviour is determined by substrate quality and differing body-waving behaviours may be a mechanism by which nematodes avoid competition.

Spatial patterns in lotic invertebrate community composition: is substrate disturbance actually important?

2003 ◽  
Vol 60 (5) ◽  
pp. 603-611 ◽  
Author(s):  
Russell G Death
Keyword(s):  
New Zealand ◽  
Community Composition ◽  
Invertebrate Community ◽  
Invertebrate Composition ◽  
Community Types ◽  
Stream Size ◽  
Substrate Disturbance ◽  
Influence Of Substrate ◽  
Forest Streams ◽  
Invertebrate Community Structure

Twenty-five forest streams were sampled in August 1994 in Te Urewera National Park, New Zealand, to examine the effect of substrate disturbance on invertebrate community structure. Stream size, flow permanence, and riparian cover were more influential than substrate disturbance in affecting invertebrate composition. Three community types were distinguishable based on these three factors: small (<1 m wide), intermittent streams were dominated by Chironomidae; larger (12–15 m wide), open streams were dominated by Chironomidae, Plecoptera, and Ephemeroptera; and intermediate-sized (1–10 m wide) streams with continuous riparian cover were dominated by mayflies and caddisflies. Periphyton biomass was negatively affected by substrate disturbance but not to the same degree as reported by others studying unshaded streams. This may explain why the influence of substrate disturbance on community composition was less than that of stream size, flow permanence, and riparian cover. The key effect of substrate disturbance on postdisturbance community composition in these light-limited New Zealand streams appears to be the removal of animals rather than food loss. Thus, differences between communities that experience high flows and those that do not are far less than they might be in unshaded streams in which the food base is more severely affected by substrate disturbance.

scholarly journals Influence of Substrate Quality and Moisture Availability on Microbial Communities and Litter Decomposition

2014 ◽  
Vol 04 (08) ◽  
pp. 421-433 ◽  
Author(s):  
David J. Berrier ◽  
Morgan S. Rawls ◽  
Shannon Leigh McCallister ◽  
Rima B. Franklin
Keyword(s):  
Microbial Communities ◽  
Litter Decomposition ◽  
Substrate Quality ◽  
Moisture Availability ◽  
Influence Of Substrate

Homoepitaxial laser diodes emitting at 390 nm and the influence of substrate quality

2007 ◽  
Vol 4 (1) ◽  
pp. 74-77
Author(s):  
Stephan Figge ◽  
Jens Dennemarck ◽  
Detlef Hommel
Keyword(s):  
Laser Diodes ◽  
Substrate Quality ◽  
Influence Of Substrate

Effects of substrate quality and annealing on defect structures at GaAs/Si interfaces

1987 ◽  
Vol 45 ◽  
pp. 340-341
Author(s):  
H. L. Tsai ◽  
J. W. Lee
Keyword(s):  
Growth Process ◽  
Molecular Beam ◽  
Substrate Surface ◽  
Lattice Misfit ◽  
Device Fabrication ◽  
Silicon Substrates ◽  
Defect Structures ◽  
Gaas Film ◽  
Substrate Quality ◽  
Gaas On Si

Growth of GaAs on Si using epitaxial techniques has been receiving considerable attention for its potential application in device fabrication. However, because of the 4% lattice misfit between GaAs and Si, defect generation at the GaAs/Si interface and its propagation to the top portion of the GaAs film occur during the growth process. The performance of a device fabricated in the GaAs-on-Si film can be degraded because of the presence of these defects. This paper describes a HREM study of the effects of both the substrate surface quality and postannealing on the defect propagation and elimination.The silicon substrates used for this work were 3-4 degrees off [100] orientation. GaAs was grown on the silicon substrate by molecular beam epitaxy (MBE).

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