Reduced Densities of the Invasive Wasp,Vespula vulgaris(Hymenoptera: Vespidae), did not Alter the Invertebrate Community Composition ofNothofagusForests in New Zealand

2013 ◽  
Vol 42 (2) ◽  
pp. 223-230 ◽  
Author(s):  
Catherine Duthie ◽  
Philip J. Lester
Keyword(s):  
New Zealand ◽  
Community Composition ◽  
Invertebrate Community ◽  
Vespula Vulgaris

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.

Limited effects of stocked trout on littoral invertebrates in boreal foothills lakes

2012 ◽  
Vol 69 (1) ◽  
pp. 178-190 ◽  
Author(s):  
Leslie E. Nasmith ◽  
William M. Tonn ◽  
Cynthia A. Paszkowski ◽  
Garry J. Scrimgeour
Keyword(s):  
Community Composition ◽  
Size Structure ◽  
Invertebrate Community ◽  
Negative Effects ◽  
High Productivity ◽  
Recreational Angling ◽  
Key Characteristics ◽  
Littoral Zones ◽  
Littoral Invertebrates ◽  
The Impact

Stocking lakes with trout for the purposes of recreational angling is a management strategy that introduces a new predator into these systems and thus deserves careful scrutiny. To assess the impact of non-native trout on littoral invertebrates in naturally fish-bearing lakes in the boreal foothills of Alberta, Canada, we compared their community composition, abundance, and size structure in stocked (n = 5) and unstocked (n = 6) lakes over a 2-year period. We detected no clear negative effects of introduced trout on invertebrate community composition and only few taxa-specific examples of decreased or increased invertebrate abundance. Furthermore, predation by trout had inconsistent direct effects on the size structure of invertebrate populations. Indirect effects were suggested by increased abundances and sizes of some invertebrate taxa in stocked lakes and might also contribute to the limited overall differences that we observed. We propose that net effects of stocked trout on littoral invertebrates are influenced by key characteristics of receiving ecosystems. In our boreal foothills lakes, dense macrophyte cover in warm littoral zones, high productivity, abundant forage fish, and limited densities of trout all likely combine to allow littoral invertebrate communities to withstand the impact of introduced trout with minimal effects.

Benthic meiofauna community composition at polluted and non-polluted sites in New Zealand intertidal environments

2007 ◽  
Vol 54 (11) ◽  
pp. 1801-1812 ◽  
Author(s):  
Lisa A. Hack ◽  
Louis A. Tremblay ◽  
Steve D. Wratten ◽  
Alison Lister ◽  
Vaughan Keesing
Keyword(s):  
New Zealand ◽  
Community Composition ◽  
Meiofauna Community ◽  
Polluted Sites ◽  
Intertidal Environments

Invertebrate community richness in New Zealand kiwifruit orchards under organic or integrated pest management

2011 ◽  
Vol 141 (1-2) ◽  
pp. 32-38 ◽  
Author(s):  
Jacqui H. Todd ◽  
Louise A. Malone ◽  
Brian H. McArdle ◽  
Jayson Benge ◽  
Joanne Poulton ◽  
...  
Keyword(s):  
New Zealand ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Invertebrate Community
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