scholarly journals Fine-scale analysis of arrowtooth flounder Atherestes stomias catch rates reveals spatial trends in abundance

2011 ◽  
Vol 438 ◽  
pp. 229-239 ◽  
Author(s):  
S Zador ◽  
K Aydin ◽  
J Cope
Keyword(s):  
Fine Scale ◽  
Scale Analysis ◽  
Spatial Trends ◽  
Arrowtooth Flounder ◽  
Catch Rates

Trawl operations in the South East Fishery, Australia: spatial distribution and intensity

2001 ◽  
Vol 52 (4) ◽  
pp. 419 ◽  
Author(s):  
James W. P. Larcombe ◽  
Kevin J. McLoughlin ◽  
Richard D. J. Tilzey
Keyword(s):  
Interannual Variation ◽  
Fine Scale ◽  
Scale Analysis ◽  
Coarse Scale ◽  
Depth Stratum ◽  
North East ◽  
Management Area ◽  
Catch Rates ◽  
High Effort ◽  
Total Effort

Trawl areas and intensities were mapped at coarse (22 km 1986–99)and fine (1 km 1995–99)scales, and statistics reported by area and depth stratum. Total effort in hours was relatively stable to 1992, then increased substantially to 1999. The total distance trawled from fine-scale analysis showed a similar trend for the 1995–99 period. Coarse-scale analysis from 1986–99 indicated effort increases in north-east Bass Strait in particular, and also off western Tasmania and west of Bass Strait. There was little change in the total area of the fishery from 1995 to 1999, but grid cells on the periphery showed considerable interannual variation in the presence or absence of fishing. Increased or redistributed effort tended to further concentrate in the relatively small high-effort areas, rather than increasing equally across the grounds, or spreading to new grounds. In the total management area, a small proportion of the 1 km grids was fished. However, in 200–1000 m depth strata, ≥50%of the grids were fished with some intensity. The consequences and compromises of spatial scale are discussed in terms of data quality, the use of trawl effort as a surrogate for marine disturbance, and the interpretation of catch rates.

scholarly journals Fine scale analysis of shifts in bacterial community structure in the chemocline of meromictic Lake Cadagno, Switzerland

2009 ◽  
Vol 68 (1) ◽  
pp. 16 ◽  
Author(s):  
Paola M.A. DECRISTOPHORIS ◽  
Sandro PEDUZZI ◽  
Nadia RUGGERI-BERNARDI ◽  
Dittmar HAHN ◽  
Mauro TONOLLA
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Meromictic Lake ◽  
Fine Scale ◽  
Scale Analysis

Adequacies and deficiencies of alpine and subalpine treeline studies in the national parks of the western USA

2010 ◽  
Vol 35 (1) ◽  
pp. 19-42 ◽  
Author(s):  
Clayton J. Whitesides ◽  
David R. Butler
Keyword(s):  
Climate Change ◽  
Content Analysis ◽  
National Parks ◽  
Fine Scale ◽  
Scale Analysis ◽  
The West ◽  
Western Usa ◽  
Alpine Treeline ◽  
The Impact ◽  
Geomorphic Processes

To mitigate the impact of direct human activity on treeline pattern and process, much alpine treeline research in the western USA has been conducted in nationally protected areas. The use of treeline as a proxy for climate change has been assessed in parks throughout the west but often at the expense of geology or geomorphology as controls of treeline variation. The dissimilar geology and geomorphic processes of the western national parks suggest that treeline may respond differently between national parks when subjected to disturbance. Therefore, predicted vegetation response to disturbance across the western USA may provide a limited assessment of change beyond fine-scale analysis due to data collection from a limited number of national parks containing alpine treeline. We performed a content analysis on previous research that examined alpine treeline in national parks and classified each treeline study as anthropogenic, orographic/edaphic, or climatic according to the primary factor attributed to treeline control. Results indicated that the three types of treeline are not uniformly studied. Climatic treeline is most commonly studied whereas anthropogenic and orographic/edaphic studies are often lacking. Furthermore, several western national parks are entirely devoid of anthropogenic and orographic treeline research. Similar findings exist for treeline studies in protected places worldwide. More research in protected places is required to broaden our understanding of multiple treeline processes across both regional and worldwide extents.

A COMPREHENSIVE APPROACH TO OIL SPILL AND HURRICANE IMPACTS

1995 ◽  
Vol 1995 (1) ◽  
pp. 980-981 ◽  
Author(s):  
Karolien Debusschere ◽  
Dianne Lindstedt ◽  
Qiang Tao ◽  
Irving A. Mendelssohn ◽  
Qianxin Lin
Keyword(s):  
Land Cover ◽  
Oil Spill ◽  
Landscape Scale ◽  
Minimal Effect ◽  
Fine Scale ◽  
Scale Analysis ◽  
Vegetative Cover ◽  
Field Surveys ◽  
Small Areas ◽  
Negative Effect

ABSTRACT The effects of a 1992 oil spill and hurricane on salt marsh recovery on a Louisiana barrier island was evaluated through a combination of landscape- and community-scale analyses. Landscape-scale analyses indicated that the hurricane had a profound effect on island land cover and morphology. The analyses indicated that the oil spill had minimal effect on island vegetation. The landscape analysis detected changes in vegetative cover in areas where oiling occurred in 1992. Field surveys identified additional small areas where oil had a negative effect on land cover. The community-scale analysis detected fine-scale vegetative responses to the spill.

scholarly journals Fine-scale analysis of heavily invaded Italian freshwater fish assemblages

2017 ◽  
Vol 12 (6) ◽  
pp. 500-511 ◽  
Author(s):  
Annamaria NOCITA ◽  
Elena TRICARICO ◽  
Sandro BERTOLINO
Keyword(s):  
Freshwater Fish ◽  
Fish Assemblages ◽  
Fine Scale ◽  
Scale Analysis
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