scholarly journals Spatial variability of humus forms in some coastal forest ecosystems of British Columbia

1995 ◽  
Vol 52 (6) ◽  
pp. 653-666 ◽  
Author(s):  
H Qian ◽  
K Klinka
Keyword(s):  
British Columbia ◽  
Spatial Variability ◽  
Forest Ecosystems ◽  
Coastal Forest ◽  
Humus Forms

Effects and importance of indigenous earthworms on decomposition and nutrient cycling in coastal forest ecosystems

1986 ◽  
Vol 16 (5) ◽  
pp. 983-989 ◽  
Author(s):  
G. A. Spiers ◽  
D. Gagnon ◽  
G. E. Nason ◽  
E. C. Packee ◽  
J. D. Lousier
Keyword(s):  
Forest Ecosystems ◽  
Coastal Forest ◽  
Mixed Stands ◽  
Earthworm Casts ◽  
Earthworm Species ◽  
Podzolic Soils ◽  
Availability Analysis ◽  
High Nutrient ◽  
Organic Horizons ◽  
Population Numbers

The general ecology of an undescribed indigenous earthworm species in the Megascolecidae, found in the organic horizons of Podzolic soils under mixed stands of Tsugaheterophylla, Abiesamabilis, Thujaplicata, and Pseudotsugamenziesii, is described. The earthworm is a member of the genus Arctiostrotus. Over a range of sites, population numbers of earthworms were correlated to rooting concentration in and immediately below the mor humus. By micromorphological examination, earthworm casts were found to account for up to 60% by volume of the constituent solids of the organic horizons. The abundance of both fine roots and fungal hyphae in the worm casts suggested high nutrient availability. Analysis of fresh faecal material showed a marked increase in most important nutrients (N, P, K, Mg, Fe, Na) relative to levels in noningested litter. Observations indicate that this earthworm species, whose population density may reach 200 m−2, has a major role in the decomposer subsystem of these ecosystems.

Spatial variability of trace metals in Podzols of northern forest ecosystems: Sampling implications

2003 ◽  
Vol 83 (5) ◽  
pp. 581-587 ◽  
Author(s):  
J. D. MacDonald ◽  
W. H. Hendershot
Keyword(s):  
Trace Metals ◽  
Spatial Variability ◽  
Point Source ◽  
Forest Ecosystems ◽  
Physical Factors ◽  
Individual Plant ◽  
Forest Site ◽  
Organic Carbon Content ◽  
Metal Concentrations ◽  
Northern Forest

The concentrations of metals in soils are spatially heterogeneous and soil sampling carried out when studying metals in forest ecosystems is often inadequate. We examined the spatial variability of Cd, Cu, Mn, Ni, Pb and Zn in northern forest ecosystems on a transect with distance from two point source emitters with the goal of providing basic information about the distribution and variability of metals in these soils. Samples were taken under six sampling points at four depths from three experimental sites on each of the two transects. Soils were analysed for acid digestible metals, pH and organic carbon content. Standard deviation, coefficients of variation, mean and medians were analysed for each horizon of each site. It was observed that Cu and Mn variability is higher in closer proximity to the point source while the variability of Zn increased with decreasing soil pH. In Sudbury, emitted metals Ni and Cu accumulate together in soils, whereas in Rouyn-Noranda, with the exception of Cd and Zn, metal concentrations were not related in forest floors. Observations suggest that physical factors influencing where metals are deposited as well as the inherent variability in soil chemical characteristics, and the distance from the point source can all act together to result in high variability in soil metal concentrations in a single forest site. Sampling in the interest of relating vegetation metal concentrations or response to soil metals should be carried out on an individual plant basis with multiple samples taken for each individual. Soil samples taken at intervals of 1 to 1.7 m will provide relative error in estimating soil concentrations of 10% or 20%, respectively. Key words: Spatial variability, trace metals, podzolic soils, smelter emissions

scholarly journals Using remote sensing to assess tsunami-induced impacts on coastal forest ecosystems at the Andaman Sea coast of Thailand

2010 ◽  
Vol 10 (4) ◽  
pp. 729-745 ◽  
Author(s):  
H. Roemer ◽  
G. Kaiser ◽  
H. Sterr ◽  
R. Ludwig
Keyword(s):  
Remote Sensing ◽  
Forest Ecosystems ◽  
Ground Truth ◽  
Andaman Sea ◽  
Coastal Forest ◽  
Coastal Forests ◽  
Change Detection Algorithms ◽  
Damage Maps ◽  
2004 Tsunami ◽  
Sea Coast

Abstract. The December 2004 tsunami strongly impacted coastal ecosystems along the Andaman Sea coast of Thailand. In this paper tsunami-induced damage of five different coastal forest ecosystems at the Phang-Nga province coast is analysed with a remote sensing driven approach based on multi-date IKONOS imagery. Two change detection algorithms, change vector analysis (CVA) and direct multi-date classification (DMC), are applied and compared regarding their applicability to assess tsunami impacts. The analysis shows that DMC outperforms CVA in terms of accuracy (Kappa values for DMC ranging between 0.947 and 0.950 and between 0.610–0.730 for CVA respectively) and the degree of detail of the created change classes. Results from DMC show that mangroves were the worst damaged among the five forests, with a 55% of directly damaged forest in the study area, followed by casuarina forest and coconut plantation. Additionally this study points out the uncertainties in both methods which are mainly due to a lack of ground truth information for the time between the two acquisition dates of satellite images. The created damage maps help to better understand the way the tsunami impacted coastal forests and give basic information for estimating tsunami sensitivity of coastal forests.

Formation forest fitotsenozov Volga River right banks

10.12737/3833 ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 149-152 ◽  
Author(s):  
Ульданова ◽  
Railya Uldanova
Keyword(s):  
Forest Ecosystems ◽  
Biological Diversity ◽  
Jaccard Coefficient ◽  
Coastal Forest ◽  
Coastal Forests ◽  
Natural Habitats ◽  
Volga River ◽  
Floristic Similarity ◽  
Α Diversity ◽  
Mixed Grass

The coastal forests, presented by valuable deciduous and coniferous forests, grow in the northeastern and eastern parts of the Volga region of the Republic of Tatarstan, skirting the high right bank of the Volga River. They contribute to the maintenance of biological diversity in nature. The study of the formation of coastal forest phytocenoses, their species diversity and the modern state is now urgent work, and development activities for the conservation of natural habitats of plants, improve the sustainability of forest ecosystems are perspective direction. According to research of the forests of the right bank of the river Volga, we present the structure of coastal forest ecosystems. The association of forest ecosystems to the various elements of the relief was installed. The types of soil and litter were presented. The estimation of α-diversity of vascular herbaceous plants and ß-diversity of the studied forest ecosystems were reported. The largest number of species of vascular plants in coastal forests are: oak plant communities; a second group includes birch plants, pine and willow; the third group - the lime and larch; the fourth group - maple plant communitie. The ß-diversity index (Whittaker’s index) of plants in the studied forests varies between 2.2-6.8. The Jaccard coefficient of floristic similarity between forest ecosystems varies from 0.01 to 0.30, which confirms the diversity of generated by coastal forest ecosystems. The greatest diversity of plants was found in forests of ash and mixed grass, mixed grass willow, oak and lime-grove, maple, ash and mixed grass larches, birch wood. The forestry activities in coastal areas should be aimed at creating productive, sustainable forest ecosystems with a rich biodiversity of flora and fauna.

scholarly journals Use of public Earth observation data for tracking progress in sustainable management of coastal forest ecosystems in Belize, Central America

2020 ◽  
Vol 245 ◽  
pp. 111798
Author(s):  
Emil A. Cherrington ◽  
Robert E. Griffin ◽  
Eric R. Anderson ◽  
Betzy E. Hernandez Sandoval ◽  
Africa I. Flores-Anderson ◽  
...  
Keyword(s):  
Central America ◽  
Sustainable Management ◽  
Forest Ecosystems ◽  
Earth Observation ◽  
Observation Data ◽  
Coastal Forest ◽  
Earth Observation Data

The Curculionidae of the Queen Charlotte Islands, British Columbia (Insecta; Coleoptera)

1988 ◽  
Vol 66 (11) ◽  
pp. 2406-2414 ◽  
Author(s):  
Robert S. Anderson
Keyword(s):  
British Columbia ◽  
Source Area ◽  
Coastal Forest ◽  
Additional Species ◽  
Queen Charlotte Islands ◽  
Forest Region ◽  
Queen Charlotte Island ◽  
Alpine Species ◽  
Palearctic Region ◽  
Late Wisconsinan

Nineteen species of weevils are reported from the Queen Charlotte Islands, British Columbia. Nine species are found throughout the coastal forest region from California north to Alaska or British Columbia. Three species are widespread throughout western North American forests. Four species are found on sand beaches from California north to British Columbia. One species is found in alpine areas from southern British Columbia north to Alaska and the Aleutian and Pribilof islands. Two species are introduced into North America from the Palearctic Region. Three additional species are reported from the islands but their occurrence was not confirmed and they are left as questionable records. Adult individuals of all known species from populations on the Queen Charlotte Islands do not appear structurally differentiated from individuals examined from representative localities elsewhere. Postglacial recolonization of the islands from a southern source area by all native lowland to montane species and from a northern source area by the sole alpine species appears to be the most parsimonious account for the origin of the weevil fauna. There is no evidence to suggest survival of any species in a Late Wisconsinan refugium as has been proposed elsewhere for a number of other animals and plants endemic to the Queen Charlotte Island archipelago.

scholarly journals The Shoreline Fringe Forest and Adjacent Peatlands of the Southern Central British Columbia Coast

2003 ◽  
Vol 117 (2) ◽  
pp. 209 ◽  
Author(s):  
Eric G. Lamb ◽  
William Megill
Keyword(s):  
British Columbia ◽  
Soil Moisture ◽  
Picea Sitchensis ◽  
Forest Vegetation ◽  
Plant Analysis ◽  
Coastal Forest ◽  
Vegetation Types ◽  
Indicator Plant ◽  
Chamaecyparis Nootkatensis ◽  
Southern Central

Four distinct vegetation types are found in close proximity along an exposed section of the southern central coast of British Columbia. A coastal fringe of coniferous forest a few hundred metres wide is separated by a steep ecotone from an inland peatland-forest complex. The objectives of this study were (1) to describe the plant communities along the transition from forest to peatland, and (2) to identify some of the major environmental factors associated with those communities using indicator plant analysis. The coastal forest is dominated by Thuja plicata, Tsuga heterophylla, Picea sitchensis, and Chamaecyparis nootkatensis. Characteristic understory species include Gaultheria shallon and Blechnum spicant. Inland from the coastal forest are transitional forest stands with a species-rich understory including Cornus canadensis, Hylocomium splendens, and Vaccinium parvifolium. The peatlands are poor fens characterized by thickets of Pinus contorta and Chamaecyparis nootkatensis among open areas dominated by species such as Sphagnum sp., Empetrum nigrum, Juniperus communis, and bogs characterized by Myrica gale, Eriophorum angustifolium, and Sanguisorba officinalis. Indicator plant analysis identified differences in the ground surface materials, soil moisture and nutrient regime between the vegetation types. The general trend is for an increase in soil moisture from the forest vegetation to the peatlands and a concurrent change from the Mor humus forms that dominate the coastal forest floor to the surface groundwater table of the peatlands. These environmental differences between forest and peatland are likely related to the steeper slopes typically found in the fringe forest vegetation.

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