scholarly journals Occurrence of flat bugs (Heteroptera: Aradidae) in burned and unburned forests

2006 ◽  
Vol 17 (2) ◽  
pp. 130-135 ◽  
Author(s):  
Joakim Hjältén ◽  
Ola Atlegrim ◽  
Frida Sandström ◽  
Roger Pettersson ◽  
Eric Rexstad
Keyword(s):  
Habitat Preferences ◽  
Mixed Forests ◽  
Burned Areas ◽  
Interior Alaska

The goal of this study was to determine the effect of fire on flat bug diversity and abundance in coniferous and mixed forests in interior Alaska. Eighty individuals, of which 78 in the burned areas and two in the control areas, of six aradid species were collected: Aradus abbas (Bergroth), A. funestus (Bergroth), A. lugubris (Fallén), A. signaticornis (Sahlberg), A. tuberculifer (Kirby) and Aneurus simplex (Uhler). Generally, all flat bug species were more abundant in the burned areas than in control areas with statistically significant differences for four of the six species and for pooled nymphs. Habitat preferences and potential mechanisms connecting mycophagy and pyrophagy are discussed.

A survey of terrestrial gastropods from central Maine

1976 ◽  
Vol 54 (5) ◽  
pp. 620-627 ◽  
Author(s):  
J. George Gleich ◽  
Frederick F. Gilbert
Keyword(s):  
Relative Abundance ◽  
Habitat Preferences ◽  
Coniferous Forests ◽  
Snail Species ◽  
Forest Types ◽  
Mixed Forests ◽  
Terrestrial Gastropods

Terrestrial gastropods were collected in central Maine from June to November 1971 to study their distribution, relative abundance, and habitat preferences. Gastropods were widespread, but not abundant. Thirty-five percent of the 1626 gastropods collected were slugs. Thirty-seven snail species, including eight slug species, were found. Discus cronkhitei and Zonitoides arboreus were the most commonly collected gastropods: Deroceras reliculatum and Pallifera dorsalis were the most common slugs. Snails (excluding slugs) were more abundant in the northwestern portion of central Maine, whereas slugs were more abundant in the southeastern portion. Slugs were significantly less abundant in coniferous forests than in deciduous or mixed forests, but snail numbers (excluding slugs) in the three forest types were not significantly different.

Spatiotemporal variation of surface shortwave forcing from fire-induced albedo change in interior Alaska

2015 ◽  
Vol 45 (3) ◽  
pp. 276-285 ◽  
Author(s):  
Shengli Huang ◽  
Devendra Dahal ◽  
Heping Liu ◽  
Suming Jin ◽  
Claudia Young ◽  
...  
Keyword(s):  
Climate Change ◽  
Spatiotemporal Variation ◽  
Climate Impacts ◽  
Future Research ◽  
Fire Scars ◽  
Successional Stage ◽  
Burned Areas ◽  
Interior Alaska ◽  
Albedo Change ◽  
Significant Spatial Variation

The albedo change caused by fires and the subsequent succession is spatially heterogeneous, leading to the need to assess the spatiotemporal variation of surface shortwave forcing (SSF) as a component to quantify the climate impacts of high-latitude fires. We used an image reconstruction approach to compare postfire albedo with the albedo assuming that no fires had occurred. Combining the fire-caused albedo change from the 2001–2010 fires in interior Alaska and the monthly surface incoming solar radiation, we examined the spatiotemporal variation of SSF in the early successional stage of approximately 10 years. Our results showed that although postfire albedo generally increased in fall, winter, and spring, some burned areas could show an albedo decrease during these seasons. In summer, the albedo increased for several years and then declined again. The spring SSF distribution did not show a latitudinal decrease from south to north as previously reported. The results also indicated that although the SSF is usually largely negative in the early successional years, it may not be significant during the first postfire year. The annual 2005–2010 SSF for the 2004 fire scars was –1.30, –4.40, –3.31, –4.00, –3.42, and –2.47 W·m−2, respectively. The integrated annual SSF map showed significant spatial variation, with a mean of –3.15 W·m−2, a standard deviation of 3.26 watts per square metre (W·m−2), and 16% of burned areas having positive SSF. Our results suggest that boreal deciduous fires would be less positive for climate change than boreal evergreen fires. Future research is needed to comprehensively investigate the spatiotemporal radiative and nonradiative forcings to determine the effect of boreal fires on the climate.

scholarly journals The effect of season and post-fire on habitat preferences of the endangered Swayne’s hartebeest (Alcelaphus buselaphus swaynei) in Maze National Park, Ethiopia

2020 ◽  
Author(s):  
Misganaw Tamrat ◽  
Anagaw Atickem ◽  
Diress Tsegaye ◽  
Paul Evangelista ◽  
Afework Bekele ◽  
...  
Keyword(s):  
Habitat Preference ◽  
National Park ◽  
Habitat Preferences ◽  
Temporal Distribution ◽  
Fire Disturbance ◽  
Conservation Strategies ◽  
Burned Areas ◽  
Controlled Burning ◽  
Dry Seasons ◽  
Similar Density

Abstract Background: The availability of preferred habitats determines the spatial and temporal distribution of herbivores in savanna ecosystems. Understanding habitat preference of a targeted wildlife species is crucial for developing effective conservation strategies. Habitat preference of large grazers in connection to grass height and post-fire effect has been debated for the last century. Here, we examined the effects of season, grass height and burning on the habitat preference on Swayne’s hartebeest ( Alcelaphus buselaphus swaynei ) in Maze National Park. Data for seasonal habitat selection were collected using both direct observation along established transect lines and pellet counting using permanently established plots. Every month, we measured grass height commonly preferred by Swayne’s hartebeest in grassland habitat. Starting from the first week of burning, we recorded the abundance of Swayne’s hartebeest in both burned and unburned grassland patches. Results: From detected pellets, 94.3% were recorded in the grassland habitat indicating that other habitat types are less used despite their extensive cover > 50% of the Park. During wet and early dry seasons, Swayne’s hartebeest exclusively preferred grassland habitat. We found that 85.2% (n=1,079) and 85.3% (n=593) of individuals observed in areas with a grass height below 30 cm during wet and early-dry seasons, respectively; while 70.9% (n=2,288) preferred grass height below 30 cm during the dry season. The density of Swayne’s hartebeest in burned grassland area was higher than unburned grassland areas up to 150 days since burning. However, in unburned grassland areas, the density was initially low but showed increasing trend for consecutive days, reaching similar density with burned areas after 150 days since burning. Conclusion: Swayne’s hartebeest exclusively preferred grassland habitat, particularly during wet and early-dry seasons, shortest available grass height in all seasons and were attracted to burned grassland areas. Our results suggested that fire played an important role in maintaining habitat quality in grassland, and that management should continue using controlled burning as a tool for the conservation of Swayne’s hartebeest. However, we remain cautious of our findings given the paucity of information regarding other confounding factors and the absence of long-term data on fire disturbance.

scholarly journals The effect of season and post-fire on habitat preferences of the endangered Swayne’s hartebeest (Alcelaphus buselaphus swaynei) in Maze National Park, Ethiopia

2019 ◽  
Author(s):  
Misganaw Tamrat ◽  
Anagaw Atickem ◽  
Diress Tsegaye ◽  
Paul Evangelista ◽  
Afework Bekele ◽  
...  
Keyword(s):  
Habitat Preference ◽  
National Park ◽  
Habitat Preferences ◽  
Temporal Distribution ◽  
Fire Disturbance ◽  
Conservation Strategies ◽  
Burned Areas ◽  
Controlled Burning ◽  
Dry Seasons ◽  
Similar Density

Abstract Background: The availability of preferred habitats determines the spatial and temporal distribution of herbivores in savanna ecosystems. Understanding habitat preference of a targeted wildlife species is crucial for developing effective conservation strategies. Habitat preference of large grazers in connection to grass height and post-fire effect has been debated for the last century. Here, we examined the effects of season, grass height and burning on the habitat preference on Swayne’s hartebeest (Alcelaphus buselaphus swaynei) in Maze National Park. Data for seasonal habitat selection were collected using both direct observation along established transect lines and pellet counting using permanently established plots. Every month, we measured grass height commonly preferred by Swayne’s hartebeest in grassland habitat. Starting from the first week of burning, we recorded the abundance of Swayne’s hartebeest in both burned and unburned grassland patches. Results: From detected pellets, 94.3% were recorded in the grassland habitat indicating that other habitat types are less used despite their extensive cover > 50% of the Park. During wet and early dry seasons, Swayne’s hartebeest exclusively preferred grassland habitat. We found that 85.2% (n=1,079) and 85.3% (n=593) of individuals observed in areas with a grass height below 30 cm during wet and early dry seasons, respectively; while 70.9% (n=2,288) preferred grass height below 30 cm during the dry season. The density of Swayne’s hartebeest in burned grassland area was higher than unburned grassland areas up to 150 days since burning. However, in unburned grassland areas, the density was initially low but showed increasing trend for consecutive days, reaching similar density with burned areas after 150 days since burning. Conclusion: Swayne’s hartebeest exclusively preferred grassland habitat, particularly during wet and early dry seasons, shortest available grass height in all seasons and were attracted to burned grassland areas. Our results suggested that fire played an important role in maintaining habitat quality in grassland, and that management should continue using controlled burning as a tool for the conservation of Swayne’s hartebeest. However, we remain cautious of our findings given the paucity of information regarding other confounding factors and the absence of long-term data on fire disturbance.

scholarly journals The effect of season and post-fire on habitat preferences of the endangered Swayne’s hartebeest (Alcelaphus buselaphus swaynei) in Maze National Park, Ethiopia

2020 ◽  
Author(s):  
Misganaw Tamrat ◽  
Anagaw Atickem ◽  
Diress Tsegaye ◽  
Paul Evangelista ◽  
Afework Bekele ◽  
...  
Keyword(s):  
Habitat Preference ◽  
National Park ◽  
Habitat Preferences ◽  
Temporal Distribution ◽  
Fire Disturbance ◽  
Conservation Strategies ◽  
Burned Areas ◽  
Controlled Burning ◽  
Dry Seasons ◽  
Similar Density

Abstract Background: The availability of preferred habitats determines the spatial and temporal distribution of herbivores in savanna ecosystems. Understanding habitat preference of a targeted wildlife species is crucial for developing effective conservation strategies. Habitat preference of large grazers in connection to grass height and post-fire effect has been debated for the last century. Here, we examined the effects of season, grass height and burning on the habitat preference on Swayne’s hartebeest (Alcelaphus buselaphus swaynei) in Maze National Park. Data for seasonal habitat selection were collected using both direct observation along established transect lines and pellet counting using permanently established plots. Every month, we measured grass height commonly preferred by Swayne’s hartebeest in grassland habitat. Starting from the first week of burning, we recorded the abundance of Swayne’s hartebeest in both burned and unburned grassland patches. Results: From detected pellets, 94.3% were recorded in the grassland habitat indicating that other habitat types are less used despite their extensive cover > 50% of the Park. During wet and early dry seasons, Swayne’s hartebeest exclusively preferred grassland habitat. We found that 85.2% (n=1,079) and 85.3% (n=593) of individuals observed in areas with a grass height below 30 cm during wet and early-dry seasons, respectively; while 70.9% (n=2,288) preferred grass height below 30 cm during the dry season. The density of Swayne’s hartebeest in burned grassland area was higher than unburned grassland areas up to 150 days since burning. However, in unburned grassland areas, the density was initially low but showed increasing trend for consecutive days, reaching similar density with burned areas after 150 days since burning. Conclusion: Swayne’s hartebeest exclusively preferred grassland habitat, particularly during wet and early-dry seasons, shortest available grass height in all seasons and were attracted to burned grassland areas. Our results suggested that fire played an important role in maintaining habitat quality in grassland, and that management should continue using controlled burning as a tool for the conservation of Swayne’s hartebeest. However, we remain cautious of our findings given the paucity of information regarding other confounding factors and the absence of long-term data on fire disturbance.

scholarly journals The effect of seasonality and post-fire on habitat preferences of the endangered Swayne’s hartebeest (Alcelaphus buselaphus swaynei) in Maze National Park, Ethiopia

2019 ◽  
Author(s):  
Misganaw Tamrat ◽  
Anagaw Atickem ◽  
Diress Tsegaye ◽  
Paul Evangelista ◽  
Afework Bekele ◽  
...  
Keyword(s):  
Habitat Selection ◽  
National Park ◽  
Habitat Preferences ◽  
Temporal Distribution ◽  
Visual Observation ◽  
Fire Disturbance ◽  
Conservation Strategies ◽  
Burned Areas ◽  
Fire Effect ◽  
Dry Seasons

Abstract Introduction The availability of preferred habitats determine the spatial and temporal distribution of herbivores in savanna ecosystems and is crucial for developing conservation strategies of targeted wildlife species. Habitat preference of large grazers in connection to grass height and post-fire effect has been debated for the last century. Here, we examined Swayne’s hartebeest’s (Alcelaphus buselaphus swaynei) seasonal habitat selection, grass height preferences and post-fire effect on their habitat preferences in Maze National Park. Data for seasonal habitat selection were collected using both visual observation along established transect routes and pellet counting using permanently established plots. Every month, we measured fresh bite grass height that was grazed by Swayne’s hartebeest in grassland habitat. Starting from the first week of burning, we recorded the abundance of Swayne’s hartebeest in both burned and unburned grassland areas. Results From detected pellets, 94.3% were recorded in the grassland habitat indicating that other habitat types are less used despite their extensive cover > 50% of the Park. During wet and early dry seasons, Swayne’s hartebeest exclusively preferred grassland habitat. We found that 85.2% (n=1079) and 85.3% (n=593) of individuals observed in areas with a grass height below 30 cm during wet and early dry seasons, respectively; while 70.9% (n=2,288) preferred grass height below 30 cm during the dry season. The density of Swayne’s hartebeest in burned grassland area was higher than unburned grassland areas upto 150 days since burning. However, in unburned grassland areas, the density was initially low but showed increasing trend for consecutive days, reaching similar abundance with burned areas after 150 days since burning. Conclusion Swayne’s hartebeests exclusively preferred grassland habitat, particularly during wet and early dry seasons, shortest available grass height in all seasons and were attracted to burned grassland areas. Our results suggested that fire played an important role in maintaining habitat quality in grassland, and that management should continue using controlled burning as a tool for the conservation of Swayne’s hartebeest. However, we remain cautious of our findings given the paucity of information regarding other confounding factors and the absence of long-term data on fire disturbance.

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