Habitat Associations of Epiphytic Lichens in Managed and Unmanaged Forest Stands in Nova Scotia

2002 ◽  
Vol 9 (1) ◽  
pp. 27 ◽  
Author(s):  
Robert Paul Cameron
Keyword(s):  
Nova Scotia ◽  
Habitat Associations ◽  
Epiphytic Lichens ◽  
Forest Stands ◽  
Unmanaged Forest

scholarly journals THE DISTRIBUTION, STATUS AND HABITAT ASSOCIATIONS OF MOOSE IN MAINLAND NOVA SCOTIA

2004 ◽  
Vol 42 (2) ◽  
Author(s):  
Tamaini V. Snaith ◽  
Karen F. Beazley
Keyword(s):  
Nova Scotia ◽  
Resource Availability ◽  
Habitat Associations ◽  
Habitat Alteration ◽  
Dense Forest ◽  
Stress Thermique ◽  
Number Of Factors ◽  
Ranging Behaviour ◽  
Facteurs Environnementaux ◽  
Successional Vegetation

Throughout the Nova Scotia mainland, small and fragmented moose populations remain at varying densities and may be limited or regulated by a number of factors including interspecific competition, disease, habitat alteration/loss, mineral toxicity/deficiency, predation, poaching, and resource availability. Ranging behaviour and habitat requirements vary according to environmental factors; however, moose require food and cover in sufficient quantity and of appropriate interspersion to meet their daily and seasonal needs. Mature forest with a well developed understory, and open areas with early successional vegetation provide forage, while dense forest provides cover from thermal stress and deep snow. Strategies for moose conservation, such as through forest management, should concentrate on the preservation and enhancement of habitat to meet the critical requirements of viable moose populations and the re-establishment of connections among discrete populations.Sur la terre ferme en Nouvelle-Écosse, il reste de petites populations fragmentées d’orignaux de densités variables qui sont peut-être limitées ou régulées par plusieurs facteurs dont la compétition interspécifique, les maladies, l’altération ou la destruction des habitats, la toxicité des minéraux ou le manque de minéraux, la prédation, le braconnage et la disponibilité des ressources. Les déplacements et les besoins en matière d’habitat des orignaux varient en fonction des facteurs environnementaux; cependant, les orignaux ont besoin de nourriture et d’un couvert adéquatement répartis pour satisfaire leurs besoins quotidiens et saisonniers. Les forêts matures à sous-étage bien développé et les zones ouvertes caractérisées par des espèces végétales pionnières fournissent la nourriture, tandis que les forêts denses offrent un couvert contre le stress thermique et la neige épaisse. Les stratégies de conservation des orignaux, par exemple associées à l’aménagement des forêts, devraient viser principalement la conservation et l’amélioration de l’habitat de manière à combler les besoins essentiels des populations viables d’orignaux, ainsi que le rétablissement de la connectivité entre les populations disjointes.

Spatial distribution of mercury and other potentially toxic elements using epiphytic lichens in Nova Scotia

Chemosphere ◽  
2020 ◽  
Vol 241 ◽  
pp. 125064 ◽  
Author(s):  
Sara J. Klapstein ◽  
Allison K. Walker ◽  
Cardy Hallett Saunders ◽  
Robert P. Cameron ◽  
John D. Murimboh ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Nova Scotia ◽  
Toxic Elements ◽  
Potentially Toxic Elements ◽  
Epiphytic Lichens

scholarly journals Autochthone Gebirgswälder in der Schweiz anhand von baumbewohnenden Flechten erkennen

2019 ◽  
Vol 170 (5) ◽  
pp. 258-265
Author(s):  
Lyudmyla Dymytrova ◽  
Urs-Beat Brändli ◽  
Silvia Stofer ◽  
Christoph Scheidegger
Keyword(s):  
Indicator Species ◽  
Forest Cover ◽  
Species Conservation ◽  
National Forest Inventory ◽  
Forest History ◽  
Mountain Forest ◽  
Epiphytic Lichens ◽  
Mountain Forests ◽  
Forest Stands ◽  
Clear Cutting

Recognizing autochthonous mountain forests in Switzerland by means of epiphytic lichens Old undisturbed forest stands with a long forest history are of particular interest for nature and species conservation. Epiphytic lichens are often used as indicators for such autochthonous stands. In this study, we tested to what extent 14 taxa of epiphytic lichens, which are easy to identify by forest practitioners and have a low dispersal potential, have specific requirements for micro habitats and are often dependent on old trees, would be suitable indicator species for autochthonous forest stands in the Swiss mountain forests. As autochthonous, we considered forest stands with a near-natural conifer composition, a minimum age of 90 years, a continuous forest cover over 120 years and no evidence of historical intervention such as clear cutting or afforestation. For the study, the regular field teams of the Swiss National Forest Inventory (NFI) included the potential indicator species in the third survey (2004–2006) on all plots in the 1.4 km network on about three trees each. The data for the 3510 plots in the mountain forest were then evaluated using the NFI data on forest structure, forest history and forest management. Overall, the number of indicator species was significantly higher in autochthonous forest stands than in non-autochthonous ones, although it varied considerably with altitude and biogeographical region. Our investigations showed that fruticose lichens of the genera Bryoria and Usnea, Evernia divaricata and Letharia vulpina, foliose lichens such as Cetrelia olivetorum and Lobaria pulmonaria, and crustose lichens such as Lecanactis abietina and Microcalicium disseminatum, Calicium sp. div. and Chaenotheca sp. div. as well as Chrysothrix candelaris are reliable indicators for autochthonous stands in Swiss mountain forests, especially if several indicator species occur together. The lichens tested are therefore suitable in practice for a simple identification of autochthonous forest stands, e.g. for delimiting forest reserves or old forest patches. These stands are of high importance for the promotion of biodiversity in a forest landscape that has been managed for centuries.

scholarly journals INVISTIGATION ON CANOPY HEIGHT AND DENSITY DIFFERENTIATIONS IN THE MANAGED AND UNMANAGED FOREST STANDS USING LIDAR DATA (CASE STUDY: SHASTKALATEH FOREST, GORGAN)

2015 ◽  
Vol XL-1-W5 ◽  
pp. 775-779
Author(s):  
Sh. Shataee ◽  
J. Mohammadi
Keyword(s):  
Canopy Cover ◽  
Canopy Height ◽  
Systematic Sampling ◽  
Lidar Data ◽  
Forest Types ◽  
Forest Stands ◽  
Managed Forest ◽  
Northern Iran ◽  
Significant Difference ◽  
Unmanaged Forest

Forest management plans are interesting to keep the forest stand natural composite and structure after silvicultural and management treatments. In order to investigate on stand differences made by management treatments, comparing of these stands with unmanaged stands as natural forests is necessary. Aerial laser scanners are providing suitable 3D information to map the horizontal and vertical characteristics of forest structures. In this study, different of canopy height and canopy cover variances between managed and unmanaged forest stands as well as in two dominant forest types were investigated using Lidar data in Dr. Bahramnia forest, Northern Iran. The in-situ information was gathered from 308 circular plots by a random systematic sampling designs. The low lidar cloud point data were used to generate accurate DEM and DSM models and plot-based height statistics metrics and canopy cover characteristics. The significant analyses were done by independent T-test between two stands in same dominant forest types. Results showed that there are no significant differences between canopy cover mean in two stands as well as forest types. Result of statistically analysis on height characteristics showed that there are a decreasing the forest height and its variance in the managed forest compared to unmanaged stands. In addition, there is a significant difference between maximum, range, and mean heights of two stands in 99 percent confidence level. However, there is no significant difference between standard deviation and canopy height variance of managed and unmanged stands. These results showd that accomplished management treatments and cuttings could lead to reducing of height variances and converting multi-layers stands to two or single layers. Results are also showed that the canopy cover densities in the managed forest stands are changing from high dense cover to dense cover.

scholarly journals New Records for the Arctic Shrew, Sorex arcticus and the Newly Recognized Maritime Shrew, Sorex maritimensis

2004 ◽  
Vol 118 (3) ◽  
pp. 400 ◽  
Author(s):  
Neil D. Perry ◽  
Donald T. Stewart ◽  
Elizabeth M. Madden ◽  
Thomas J. Maier
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
New Records ◽  
First Record ◽  
Habitat Associations ◽  
The State ◽  
The Arctic ◽  
Limited Knowledge ◽  
The Status ◽  
Careful Assessment

We report the first record for the Arctic Shrew (Sorex arcticus) in the state of Montana, USA. We also report range extensions for the closely related Maritime Shrew (Sorex maritimensis) in New Brunswick and Nova Scotia, Canada. These collections augment our limited knowledge of the ranges and habitat associations of these rarely collected shrews, and highlight the need for a careful assessment of the status of S. maritimensis in Canada.

scholarly journals Habitat associations and distribution model forFuscopannaria leucostictain Nova Scotia, Canada

2018 ◽  
Vol 50 (4) ◽  
pp. 487-497 ◽  
Author(s):  
Kara PEARSON ◽  
Robert CAMERON ◽  
R. Troy MCMULLIN
Keyword(s):  
Nova Scotia ◽  
Large Population ◽  
Area Under The Curve ◽  
Habitat Associations ◽  
Distribution Model ◽  
Conservation Strategies ◽  
Mean Annual Temperature ◽  
Suitable Habitat ◽  
Ecological Requirements ◽  
Temperature And Precipitation

AbstractFuscopannaria leucostictais a rare and understudied cyanolichen with an interesting and unusual distribution in tertiary relict hotspots worldwide. There is a relatively large population in eastern North America, where it occurs mostly throughout the Appalachian Mountains and reaches its northernmost extent in New Brunswick and Nova Scotia, Canada. The ability to detect this species, and thus determine its habitat requirements, is critical for understanding how it might be affected by human-induced environmental degradation. Maximum entropy modelling with MaxEnt was used to predict the distribution of suitable habitat for this species in Nova Scotia using 62 presence locations, 1405 pseudo-absence locations and four environmental covariates: depth to water table (a proxy for relative soil moisture), distance to the coast and mean annual temperature and precipitation. Our predictive maps identify important habitat features and areas of high suitability in Nova Scotia with an area under the curve value of 0·85. The predicted distribution of this lichen was most affected by temperature. This study elucidates locations as well as species-habitat relationships forF. leucosticta,providing land managers with baseline data that can aid in the discovery of additional populations and provide a better understanding of its ecological requirements which will support the development of sound conservation strategies for this rare lichen.

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