Effects of error in model input: experiments with a forest patch model

2004 ◽  
Vol 173 (2-3) ◽  
pp. 159-176 ◽  
Author(s):  
Manfred J Lexer ◽  
Karl Hönninger
Keyword(s):  
Forest Patch ◽  
Patch Model ◽  
Model Input ◽  
Forest Patch Model

scholarly journals Improving the establishment submodel of a forest patch model to assess the long-term protective effect of mountain forests

2006 ◽  
Vol 126 (1) ◽  
pp. 131-145 ◽  
Author(s):  
A. Wehrli ◽  
P. J. Weisberg ◽  
W. Schönenberger ◽  
P. Brang ◽  
H. Bugmann
Keyword(s):  
Protective Effect ◽  
Mountain Forests ◽  
Forest Patch ◽  
Patch Model ◽  
Forest Patch Model

Using a forest patch model to predict the dynamics of stand structure in Swiss mountain forests

2005 ◽  
Vol 205 (1-3) ◽  
pp. 149-167 ◽  
Author(s):  
André Wehrli ◽  
Andreas Zingg ◽  
Harald Bugmann ◽  
Andreas Huth
Keyword(s):  
Stand Structure ◽  
Mountain Forests ◽  
Forest Patch ◽  
Patch Model ◽  
Forest Patch Model

scholarly journals Evaluation of a 3-D rockfall module within a forest patch model

2010 ◽  
Vol 10 (4) ◽  
pp. 699-711 ◽  
Author(s):  
W. Rammer ◽  
M. Brauner ◽  
L. K. A. Dorren ◽  
F. Berger ◽  
M. J. Lexer
Keyword(s):  
Vital Role ◽  
Iterative Sequence ◽  
Dynamics Model ◽  
Forest Patch ◽  
Protection Effect ◽  
Support Tools ◽  
Real Size ◽  
The Alps ◽  
Forest Patch Model ◽  
Range Of Variation

Abstract. Many slopes in the Alps are prone to rockfall and forests play a vital role in protecting objects such as (rail) roads and infrastructure against rockfall. Decision support tools are required to assess rockfall processes and to quantify the rockfall protection effect of forest stands. This paper presents results of an iterative sequence of tests and improvements of a coupled rockfall and forest dynamics model with focus on the rockfall module. As evaluation data a real-size rockfall experiment in the French Alps and two 2-D rockfall trajectories from Austria and Switzerland were used. Modification of the rebound algorithm and the inclusion of an algorithm accounting for the sudden halt of falling rocks due to surface roughness greatly improved the correspondence between simulated and observed key rockfall variables like run-out distances, rebound heights and jump lengths for the real-size rockfall experiment. Moreover, the observed jump lengths and run-out distances of the 2-D trajectories were well within the stochastic range of variation yielded by the simulations. Based on evaluation results it is concluded that the rockfall model can be employed to assess the protective effect of forest vegetation.

Understory use by terrestrial small mammals in an unflooded forest patch in the Pantanal floodplain

Mammalia ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Nayara Yoshie Sano ◽  
Heitor Miraglia Herrera ◽  
Grasiela Edith de Oliveira Porfirio ◽  
Filipe Martins Santos
Keyword(s):  
Small Mammals ◽  
Small Mammal ◽  
Understory Vegetation ◽  
Monodelphis Domestica ◽  
Forest Patch ◽  
Habitat Features ◽  
Species Characteristics ◽  
Local Habitat

AbstractTo date, there have been no studies that have evaluated small mammal utilization of the understory of forests. In this study, we described the use of vertical strata by small mammals in patches of unflooded forests, known as “cordilheiras”, in the Nhecolândia sub-region of the Pantanal, Brazil. We collected all species using the ground and understory, including the terrestrial didelphid Monodelphis domestica. We suppose that local habitat features (e.g., Acuri palms), rather than intrinsic species characteristics, may be more conducive to the use of understory vegetation by small mammals in the Nhecolândia region.

scholarly journals The wildcat Felis silvestris in northern Turkey: assessment of status using camera trapping

Oryx ◽  
2011 ◽  
Vol 45 (1) ◽  
pp. 112-118 ◽  
Author(s):  
Özgün Emre Can ◽  
İrfan Kandemi̇r ◽  
İnci̇ Togan
Keyword(s):  
Population Size ◽  
Camera Traps ◽  
Sampling Effort ◽  
Felis Silvestris ◽  
Forest Patch ◽  
Western Turkey ◽  
Lack Of Information ◽  
The Status ◽  
Capture Recapture ◽  
Estimate Population Size

AbstractThe wildcat Felis silvestris is a protected species in Turkey but the lack of information on its status is an obstacle to conservation initiatives. To assess the status of the species we interviewed local forestry and wildlife personnel and conducted field surveys in selected sites in northern, eastern and western Turkey during 2000–2007. In January–May 2006 we surveyed for the wildcat using 16 passive infrared-trigged camera traps in Yaylacı k Research Forest, a 50-km2 forest patch in Yenice Forest in northern Turkey. A total sampling effort of 1,200 camera trap days over 40 km2 yielded photo-captures of eight individual wildcats over five sampling occasions. Using the software MARK to estimate population size the closed capture–recapture model M0, which assumes a constant capture probability among all occasions and individuals, best fitted the capture history data. The wildcat population size in Yaylacı k Research Forest was estimated to be 11 (confidence interval 9–23). Yenice Forest is probably one of the most important areas for the long-term conservation of the wildcat as it is the largest intact forest habitat in Turkey with little human presence, and without human settlements, and with a high diversity of prey species. However, it has been a major logging area and is not protected. The future of Yenice Forest and its wildcat population could be secured by granting this region a protection status and enforcing environmental legislation.

scholarly journals Frequency of Aedes sp. Linnaeus (Diptera: Culicidae) and Associated Entomofauna in Bromeliads from a Forest Patch within a densely Urbanized Area

2017 ◽  
Vol 46 (6) ◽  
pp. 613-621 ◽  
Author(s):  
T N Docile ◽  
R Figueiró ◽  
N A Honório ◽  
D F Baptista ◽  
G Pereira ◽  
...  
Keyword(s):  
Forest Patch ◽  
Urbanized Area

Estimation of impedance model input parameters from in situ measurements: Principles and applications

2015 ◽  
Vol 95 ◽  
pp. 27-36 ◽  
Author(s):  
Gwenaël Guillaume ◽  
Olivier Faure ◽  
Benoit Gauvreau ◽  
Fabrice Junker ◽  
Michel Bérengier ◽  
...  
Keyword(s):  
In Situ Measurements ◽  
Impedance Model ◽  
Model Input ◽  
Input Parameters

Climbing asparagus, Asparagus scandens Thunb.: a South African in your forest patch

2000 ◽  
Vol 25 (5) ◽  
pp. 533-538 ◽  
Author(s):  
Susan M. Timmins ◽  
Virginia Reid
Keyword(s):  
South African ◽  
Forest Patch

scholarly journals PRESERVATION OF PRIMARY FOREST CHARACTERISTICS DESPITE FRAGMENTATION AND ISOLATION IN A FOREST REMNANT FROM VIÇOSA, MG, BRAZIL1

2015 ◽  
Vol 39 (6) ◽  
pp. 985-994 ◽  
Author(s):  
Markus Gastauer ◽  
Marcos Eduardo Guerra Sobral ◽  
João Augusto Alves Meira-Neto
Keyword(s):  
Species Richness ◽  
Endemic Species ◽  
Tree Species ◽  
Primary Forest ◽  
Forest Patch ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Forest Remnant ◽  
Primary Forests ◽  
Biotic Resources

According to its owners, the Forest of Seu Nico (FSN) from the Viçosa municipality, Minas Gerais, Brazil, never has been logged and is therefore considered a primary forest. Nevertheless, the forest patch suffered impacts due to selective wood and non-timber extraction, fragmentation and isolation. Aim of this study was to test if the FSN, despite impacts, preserved characteristics of primary forests, which are elevated percentages of non-pioneer (>90%), animal-dispersed (>80 %), understory (>50%) and endemic species (~40%). For that, all trees with diameter at breast height equal or major than 3.2 cm within a plot of 100 x 100 m were identified. With 218 tree species found within this hectare, the FSN's species richness is outstanding for the region. The percentages of non-pioneer (92 %), animal-dispersed (85 %), understory (55 %) and endemic species (39.2 %) from the FSN fulfill the criteria proposed for primary forest. Therefore, we conclude that the FSN maintained its characteristics as a primary forest which highlights its importance for the conservation of biotic resources in the region, where similar fragments are lacking or not described yet.

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