scholarly journals Satellite‐based habitat monitoring reveals long‐term dynamics of deer habitat in response to forest disturbances

2020 ◽  
Author(s):  
Julian Oeser ◽  
Marco Heurich ◽  
Cornelius Senf ◽  
Dirk Pflugmacher ◽  
Tobias Kuemmerle
Keyword(s):  
Forest Disturbances ◽  
Habitat Monitoring

scholarly journals Long-term (1990–2019) monitoring of forest cover changes in the humid tropics

2021 ◽  
Vol 7 (10) ◽  
pp. eabe1603
Author(s):  
C. Vancutsem ◽  
F. Achard ◽  
J.-F. Pekel ◽  
G. Vieilledent ◽  
S. Carboni ◽  
...  
Keyword(s):  
Forest Cover ◽  
Degradation Process ◽  
Forest Disturbances ◽  
Conservation Policies ◽  
The Past ◽  
Moist Forest ◽  
Forest Cover Changes ◽  
Global Carbon

Accurate characterization of tropical moist forest changes is needed to support conservation policies and to quantify their contribution to global carbon fluxes more effectively. We document, at pantropical scale, the extent and changes (degradation, deforestation, and recovery) of these forests over the past three decades. We estimate that 17% of tropical moist forests have disappeared since 1990 with a remaining area of 1071 million hectares in 2019, from which 10% are degraded. Our study underlines the importance of the degradation process in these ecosystems, in particular, as a precursor of deforestation, and in the recent increase in tropical moist forest disturbances (natural and anthropogenic degradation or deforestation). Without a reduction of the present disturbance rates, undisturbed forests will disappear entirely in large tropical humid regions by 2050. Our study suggests that reinforcing actions are needed to prevent the initial degradation that leads to forest clearance in 45% of the cases.

scholarly journals Long-term (1990-2019) monitoring of tropical moist forests dynamics

2020 ◽  
Author(s):  
C. Vancutsem ◽  
F. Achard ◽  
J.-F. Pekel ◽  
G. Vieilledent ◽  
S. Carboni ◽  
...  
Keyword(s):  
Carbon Fluxes ◽  
Degradation Process ◽  
Forest Disturbances ◽  
Conservation Policies ◽  
Recent Increase ◽  
Moist Forest ◽  
Forest Clearance ◽  
Global Carbon

ABSTRACTAccurate characterization of the tropical moist forests changes is needed to support conservation policies and to better quantify their contribution to global carbon fluxes. We document - at pantropical scale - the extent of these forests and their changes (degradation, deforestation and recovery) over the last three decades. We estimate that 17% of the tropical moist forests have disappeared since 1990 with a remaining area of 1060 million ha in 2019, from which 8.5% are degraded. Our study underlines the importance of the degradation process in such ecosystems, in particular as precursor of deforestation and in the recent increase of the tropical moist forest disturbances. Without reduction of the present disturbance rates, undisturbed forests will disappear entirely in large tropical humid regions by 2050. Our study suggests reinforcing actions to prevent the first disturbance scar that leads to forest clearance in 45% of the cases.

Accurate forest projections require long-term wood decay experiments because trait effects change.

2019 ◽  
Author(s):  
Brad Oberle ◽  
Marissa R. Lee ◽  
Jonathan A. Myers ◽  
Oyomoare L. Osazuwa-Peters ◽  
Marko J. Spasojevic ◽  
...  
Keyword(s):  
Wood Decay ◽  
Decay Rates ◽  
Environmental Drivers ◽  
Forest Plot ◽  
Forest Disturbances ◽  
Wood Traits ◽  
Temporal Trajectory ◽  
Term Data ◽  
Complete Mineralization

Deadwood is a large aboveground carbon (C) pool that regulates how forests respond to global change. Due to slow decomposition, CWD delays C emissions following major forest disturbances so predicting how carbon balance will respond to changing disturbance regimes requires identifying factors that influence the full temporal trajectory of wood decay from senescence to complete mineralization. However, typical experiments only examine how wood decay begins with unknown consequences for scaling short-term results up to long-term forest ecosystem projections. Using a 7-year experiment that captured complete mineralization among 21 temperate tree species, we demonstrate that (1) wood traits are more important than environmental drivers, (2) trait effects fade with advancing decay and (3) permeability-related traits control how decay rates change through time. Only long-term data and a time-varying model yielded accurate predictions of both mass loss in a concurrent experiment and naturally-recruited deadwood structure in a 32-year old forest plot. Given the importance of forests in the carbon cycle, and the pivotal role for wood decay, accurate ecosystem projections are critical and they require experiments that go beyond enumerating potential mechanisms by identifying the temporal scale for their effects.

scholarly journals Habitat mapping and conservation threats to river dolphin in Karnali River of Nepal

1970 ◽  
pp. 24-29
Author(s):  
R Malla
Keyword(s):  
Local Level ◽  
Group Discussion ◽  
Habitat Mapping ◽  
Habitat Monitoring ◽  
High Dependency ◽  
Dolphin Population ◽  
Negative Impacts ◽  
Conservation Threats ◽  
Pie Chart

This study was carried out in the Karnali River of Nepal with the aims of preparing habitat map of dolphins in the Karnali River and assessing conservation threats to dolphin at the local level. The habitat map of the dolphin was prepared on the basis of study and local sightings. Altogether 100 households were surveyed around the Karnali River living within 3 km from the river distance. Questionnaire survey, group discussion, field observation and key-informants interviews were conducted to assess conservation threats to dolphin at the local level. Statistical tools like Pie chart and bar diagram were used to analyze the data. Use of poison in the river, commercial and domestic consumption of fishes, and high dependency of people in the river are emerging as the threats to dolphin conservation. Similarly, the increasing trend of using chemical fertilizer in the agriculture land is also adding up to long term negative impacts on dolphin population. Regular habitat monitoring of the dolphins should be done in major areas to acquire timely information on status and distribution of dolphins for dolphin conservation. Also, local people should be provided with alternate incentives by actively mobilizing them in dolphin conservation work Key words: Dolphins, habitat mapping, conservation threats, Karnali river   doi: 10.3126/banko.v19i3.2208 Banko Janakari, Special Issue February 2009, 24-29

scholarly journals CAD/GIS AS A TOOL IN NATIVE PLANT SPECIES CONSERVATION

HortScience ◽  
1993 ◽  
Vol 28 (4) ◽  
pp. 273B-273
Author(s):  
D.L. Creech ◽  
D. McDonald
Keyword(s):  
Plant Communities ◽  
Community Dynamics ◽  
Species Conservation ◽  
Computer Assisted ◽  
Native Plant ◽  
East Texas ◽  
Gis Technology ◽  
Native Plant Species ◽  
Habitat Monitoring

Texas is botanically diverse with approximately 5500 native plants identified: east Texas contains about 40% of the total. While most species are stable, many are classified as rare, threatened, vulnerable, or endangered. Databases for east Texas plant communities and vegetative analyses are numerous. However, they are not yet integrated into easy-to-sort-and-query computer files. Computer-Assisted Drafting (CAD) and Geographic Information Systems (GIS) technology offers powerful applications to the storage, management, and spatial analysis of species inventories, plant community dynamics, and long-term habitat monitoring. At SFASU, the College of Forestry's GIS Center is being utilized to develop comprehensive east Texas resource inventories on a ten-station HP Apollo/ArcInfo platform. In the horticulture program, a twenty-station PC/AutoCad teaching laboratory is being used to create layered maps of the SFASU Arboretum, the on-campus landscape and off-campus plant communities. The integration of CAD and GIS projects through a DXF format takes advantage of the attributes of both technologies.

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