Too hot to trot? Evaluating the effects of wildfire on patterns of occupancy and abundance for a climate-sensitive habitat specialist

2015 ◽  
Vol 24 (7) ◽  
pp. 921 ◽  
Author(s):  
Johanna Varner ◽  
Mallory S. Lambert ◽  
Joshua J. Horns ◽  
Sean Laverty ◽  
Laurie Dizney ◽  
...  
Keyword(s):  
Fire Severity ◽  
Individual Species ◽  
Small Animals ◽  
Habitat Specialist ◽  
Burned Areas ◽  
Disturbance Regimes ◽  
Thermal Refuge ◽  
Habitat Factors ◽  
In Fire

Wildfires are increasing in frequency and severity as a result of climate change in many ecosystems; however, effects of altered disturbance regimes on wildlife remain poorly quantified. Here, we leverage an unexpected opportunity to investigate how fire affects the occupancy and abundance of a climate-sensitive habitat specialist, the American pika (Ochotona princeps). We determine the effects of a fire on microclimates within talus and explore habitat factors promoting persistence and abundance in fire-affected habitat. During the fire, temperatures in talus interstices remained below 19°C, suggesting that animals could have survived in situ. Within 2 years, pikas were widely distributed throughout burned areas and did not appear to be physiologically stressed at severely burned sites. Furthermore, pika densities were better predicted by topographic variables known to affect this species than by metrics of fire severity. This widespread distribution may reflect quick vegetation recovery and the fact that the fire did not alter the talus microclimates in the following years. Together, these results highlight the value of talus as a thermal refuge for small animals during and after fire. They also underscore the importance of further study in individual species’ responses to typical and altered disturbance regimes.

Dispersal-limited detritivores in fire-prone environments: persistence and population structure of terrestrial amphipods (Talitridae)

2016 ◽  
Vol 25 (7) ◽  
pp. 753 ◽  
Author(s):  
L. Menz ◽  
H. Gibb ◽  
N. P. Murphy
Keyword(s):  
Population Structure ◽  
Fire Severity ◽  
Critical Role ◽  
Life History Strategies ◽  
Taxonomic Resolution ◽  
Genetic Analyses ◽  
Limited Dispersal ◽  
In Fire ◽  
The Impact

Invertebrate detritivores play a critical role in the decomposition of litter, an important component of wildfire fuel. Knowledge of invertebrate response to fire is often hampered by taxonomic resolution; however, genetic species identification can enable analysis of fine-scale assemblages and the interaction between dispersal and population recovery. In this study, we ask: do terrestrial amphipod assemblages differ following increasing fire severities and does population structure indicate in situ survival or recolonisation following severe fires? Using seven replicate sites over three fire severities, we measured amphipod abundance at the site of the catastrophic 2009 ‘Black Saturday’ fires in south-east Australia. Genetic analyses to distinguish species and population structure revealed 16 species. Populations of Arcitalitrus sylvaticus were highly structured, suggesting limited dispersal. Amphipod abundance and species richness were not affected by fire severity 3 years after fire. Localised population structure within A. sylvaticus suggests that in situ survival enabled amphipods to repopulate severely burnt sites. The genetic analyses used in this study enabled the detection of unrecognised diversity and population structure in these detritivores. With many detritivores showing similar life history strategies, studies that combine a genetic and ecological approach are essential for understanding the impact of fire on litter decomposition.

scholarly journals The effects of wildfire severity and pyrodiversity on bat occupancy and diversity in fire-suppressed forests

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Z. L. Steel ◽  
B. Campos ◽  
W. F. Frick ◽  
R. Burnett ◽  
H. D. Safford
Keyword(s):  
Sierra Nevada ◽  
Habitat Management ◽  
Fire Suppression ◽  
Fire Severity ◽  
Species Conservation ◽  
Burn Severity ◽  
Individual Species ◽  
Imperfect Detection ◽  
In Fire ◽  
Occupancy Rates

AbstractWildfire is an important ecological process that influences species’ occurrence and biodiversity generally. Its effect on bats is understudied, creating challenges for habitat management and species conservation as threats to the taxa worsen globally and within fire-prone ecosystems. We conducted acoustic surveys of wildfire areas during 2014–2017 in conifer forests of California’s Sierra Nevada Mountains. We tested effects of burn severity and its variation, or pyrodiversity, on occupancy and diversity for the 17-species bat community while accounting for imperfect detection. Occupancy rates increased with severity for at least 6 species and with pyrodiversity for at least 3. Two other species responded negatively to pyrodiversity. Individual species models predicted maximum occupancy rates across burn severity levels but only one species occurred most often in undisturbed areas. Species richness increased from approximately 8 species in unburned forests to 11 in pyrodiverse areas with moderate- to high-severity. Greater accessibility of foraging habitats, as well as increased habitat heterogeneity may explain positive responses to wildfire. Many bat species appear well adapted to wildfire, while a century of fire suppression and forest densification likely reduced habitat quality for the community generally. Relative to other taxa, bats may be somewhat resilient to increases in fire severity and size; trends which are expected to continue with accelerating climate change.

scholarly journals Avian Community Response to Midrotation Herbicide Release and Prescribed Burning in Conservation Reserve Program Plantations

2008 ◽  
Vol 32 (3) ◽  
pp. 111-119 ◽  
Author(s):  
Brandon Sladek ◽  
L. Burger ◽  
Ian Munn
Keyword(s):  
Loblolly Pine ◽  
Prescribed Burning ◽  
Conservation Reserve Program ◽  
Volume Growth ◽  
Bird Species ◽  
Community Response ◽  
Individual Species ◽  
Avian Community ◽  
Disturbance Regimes ◽  
Pinus Spp

Abstract Former agricultural lands converted to pine (Pinus spp.) plantations in the Conservation Reserve Program (CRP) have potential to provide early successional (ES) habitat for many regionally declining pine/grassland and shrub-successional bird species if actively managed with appropriate disturbance regimes. One such regime is use of the selective herbicide Imazapyr (Arsenal Applicators Concentrate) and prescribed burning, which is permitted on CRP lands and cost share payments are available. This study quantified combined effects of Imazapyr and prescribed fire on the breeding season avian community characteristics and pine volume growth in thinned, midrotation afforested loblolly pine (Pinus taedaL.) plantations in Mississippi. Herbicide treatments were applied in fall of 2002 and winter burns were conducted during winter and early spring of 2002–2003. ES bird species richness was significantly greater in the treated plots compared with controls for both 2003 and 2004. Ten individual species exhibited treatment effects. These responses by ES bird species indicate that midrotation CRPplantations can provide needed ES habitat if treated with appropriate disturbance regimes.

PENILAIAN DAMPAK KEBAKARAN PADA TEGAKAN AKASIA DI BKPH PARUNG PANJANG KPH BOGOR, PERUM PERHUTANI UNIT III JAWA BARAT DAN BANTEN Fire Severity Assessment on Akasia stand at BKPH Parung Panjang KPH Bogor, Perum Perhutani III West Java and Banten

2017 ◽  
Vol 8 (1) ◽  
pp. 55-62
Author(s):  
Lailan Syaufina ◽  
Vera Linda Purba
Keyword(s):  
Growth Performance ◽  
Forest Fire ◽  
Health Monitoring ◽  
Fire Severity ◽  
Forest Health ◽  
Chemical Properties ◽  
Fire Effects ◽  
Burned Areas ◽  
Forest Health Monitoring ◽  
Physical And Chemical

Forest fire is one of the problem in forest management. The objectives of the study was to measure the forest fire severity based on soil physical and chemical properties. The forest fire effects were assessed using fire severity method and forest health monitoring plot. The study indicated that the burned areas at BKPH Parung Panjang after two years included in low fire severity. The site properties and growth performance analysis showed that the fire has only affected on pH, Mg and tree diameter significantly, whereas the other parameters such as bulk density, P, N, Na, K, Ca and height were not significantly affected. In addition, both burned and unburned areas are classified as in health condition.Key words : fire severity, forest health monitoring, growth performance, site properties

scholarly journals Estimates of biomass burning emissions in tropical Asia based on satellite-derived data

2010 ◽  
Vol 10 (5) ◽  
pp. 2335-2351 ◽  
Author(s):  
D. Chang ◽  
Y. Song
Keyword(s):  
Biomass Burning ◽  
Atmospheric Chemistry ◽  
Crop Residue ◽  
Fire Season ◽  
Burned Area ◽  
Published Data ◽  
Tropical Asia ◽  
Fire Emissions ◽  
Burned Areas ◽  
In Fire

Abstract. Biomass burning in tropical Asia emits large amounts of trace gases and particulate matter into the atmosphere, which has significant implications for atmospheric chemistry and climatic change. In this study, emissions from open biomass burning over tropical Asia were evaluated during seven fire years from 2000 to 2006 (1 March 2000–31 February 2007). The size of the burned areas was estimated from newly published 1-km L3JRC and 500-m MODIS burned area products (MCD45A1). Available fuel loads and emission factors were assigned to each vegetation type in a GlobCover characterisation map, and fuel moisture content was taken into account when calculating combustion factors. Over the whole period, both burned areas and fire emissions showed clear spatial and seasonal variations. The size of the L3JRC burned areas ranged from 36 031 km2 in fire year 2005 to 52 303 km2 in 2001, and the MCD45A1 burned areas ranged from 54 790 km2 in fire year 2001 to 148 967 km2 in 2004. Comparisons of L3JRC and MCD45A1 burned areas using ground-based measurements and other satellite data were made in several major burning regions, and the results suggest that MCD45A1 generally performed better than L3JRC, although with a certain degree of underestimation in forest areas. The average annual L3JRC-based emissions were 123 (102–152), 12 (9–15), 1.0 (0.7–1.3), 1.9 (1.4–2.6), 0.11 (0.09–0.12), 0.89 (0.63–1.21), 0.043 (0.036–0.053), 0.021 (0.021–0.023), 0.41 (0.34–0.52), 3.4 (2.6–4.3), and 3.6 (2.8–4.7) Tg yr−1 for CO2, CO, CH4, NMHCs, NOx, NH3, SO2, BC, OC, PM2.5, and PM10, respectively, whereas MCD45A1-based emissions were 122 (108–144), 9.3 (7.7–11.7), 0.63 (0.46–0.86), 1.1 (0.8–1.6), 0.11 (0.10–0.13), 0.54 (0.38–0.76), 0.043 (0.038–0.051), 0.033 (0.032–0.037), 0.39 (0.34–0.47), 3.0 (2.6–3.7), and 3.3 (2.8–4.0) Tg yr−1. Forest burning was identified as the major source of the fire emissions due to its high carbon density. Although agricultural burning was the second highest contributor, it is possible that some crop residue combustion was missed by satellite observations. This possibility is supported by comparisons with previously published data, and this result may be due to the small size of the field crop residue burning. Fire emissions were mainly concentrated in Indonesia, India, Myanmar, and Cambodia. Furthermore, the peak in the size of the burned area was generally found in the early fire season, whereas the maximum fire emissions often occurred in the late fire season.

Fire activity and its influence on Aerosol Optical Depth and Green-House Gases over PEEX area for the last two decades

2021 ◽  
Author(s):  
Larisa Sogacheva ◽  
Anu-Maija Sundström ◽  
Timo H. Virtanen ◽  
Antti Arola ◽  
Tuukka Petäjä ◽  
...  
Keyword(s):  
Climate Change ◽  
Remote Sensing ◽  
Boreal Forest ◽  
Atmospheric Composition ◽  
Future Climate Change ◽  
Individual Species ◽  
Modeling Tools ◽  
Fire Emissions ◽  
Burned Areas ◽  
Fire Activity

<p>The Pan-Eurasian Experiment Program (PEEX) is an interdisciplinary scientific program bringing together ground-based in situ and remote sensing observations, satellite measurements and modeling tools aiming to improve the understanding of land-water-atmosphere interactions, feedback mechanisms and their effects on the ecosystem, climate and society in northern Eurasia, Russia and China. In a view of the large area covering thousands of kilometres, large gaps will remain where no or little ground-based observational information will be available. The gap can partly be filled by satellite remote sensing of relevant parameters as regards atmospheric composition.</p><p>Biomass burning is a violent source of atmospheric pollutants. Fires and corresponding emissions to the atmosphere dramatically change the atmospheric composition in case of long-lasting fire events, which might cover extended areas. In the burned areas, CO2 exchange, as well as emissions of different compounds are getting to higher levels, which might contribute to climate change by changing the radiative budget through the aerosol-cloud interaction and cloud formation. In the boreal forest, after CO2, CO and CH4, the largest emission factors for individual species were formaldehyde, followed by methanol and NO2 (Simpson et al., ACP, 2011). The emitted long-life components, e.g., black carbon, might further be transported to the distant areas and measured at the surface far from the burned areas.</p><p>In the boreal forest region, fires are very common, very large and produce a lot of smoke. Boreal areas  have been burning regularly for thousands of years and is adapted to fires, which happen most often between May and October. In boreal ecosystems, future increases in air temperature may lengthen the fire season and increase the probability of fires, leading some to hypothesize a positive feedback between warming, fire activity, carbon loss, and future climate change (Kasischke et al., 2000). </p><p> During the last few decades, several burning episodes have been observed over PEEX area by satellites (as fire counts), specifically over Siberia and central Russia. The following information available from satellites will be utilized to reveal a connection between Fire activity and atmospheric composition <span>for the period 2002-2020 over the PEEX area:</span></p><ul><li>- Fire count, FRP and burned areas from MODIS</li> <li>- Absorbing Aerosol Index (AAI), multi-instrument (GOME-2, OMI, TOMS) product</li> <li>- CO from MOPPIT</li> <li>- HCHO and NO2 from OMI</li> </ul><p>Monthly temperature and humidity fields from ERA5 re-analysis will be also utilized to reveal if a connection exist between climate variables and occurrence and intensity of the forest fires.</p><p>Kasischke, B. J. Stocks: Fire, Climate Change, and Carbon Cycling in the Boreal Forest. M. M. Cadwellet al.,Eds., Ecological Studies (Springer, New York, 2000)</p><p>Simpson, I. J., Akagi, S. K., Barletta, B., Blake, N. J., Choi, Y., Diskin, G. S., Fried, A., Fuelberg, H. E., Meinardi, S., Rowland, F. S., Vay, S. A., Weinheimer, A. J., Wennberg, P. O., Wiebring, P., Wisthaler, A., Yang, M., Yokelson, R. J., and Blake, D. R.: Boreal forest fire emissions in fresh Canadian smoke plumes: C<sub>1</sub>-C<sub>10</sub> volatile organic compounds (VOCs), CO<sub>2</sub>, CO, NO<sub>2</sub>, NO, HCN and CH<sub>3</sub>CN, Atmos. Chem. Phys., 11, 6445–6463, https://doi.org/10.5194/acp-11-6445-2011, 2011.</p><p> </p>

Narratives for the fourth millennium

2018 ◽  
Author(s):  
Keith Ray ◽  
Julian Thomas
Keyword(s):  
Extended Period ◽  
Historical Narrative ◽  
Neolithic Period ◽  
Limited Extent ◽  
Burned Areas ◽  
Individual Site ◽  
Rubbish Dumps ◽  
Material Evidence ◽  
Stratigraphic Sequences

The story of the Neolithic period in Britain as we so far understand it has been compiled from myriad individual archaeological encounters with the traces of human activity from the centuries concerned in different places within the landscape. These traces include the remains of partly earth-fast timber structures which often consist of recognizable features representing where the timbers had been pulled out of the ground, or had rotted in situ, or had been burned; areas of burning of ground-surfaces where hearth-fires had been laid; spreads of decayed materials that were formerly rubbish dumps or ‘middens’; large holes (usually referred to as ‘pits’) dug and backfilled with various deposits including whole or broken artefacts thrown or placed within them; and ditches that had been infilled or had silted up, and sometimes re-dug and redefined. The different episodes of construction and deposition that led to the formation of these traces are differentiated by those investigating them through the identification of thousands of isolable ‘events’. Some of these events were almost momentary (the digging of a pit, the removal of a post), while others (such as the gradual silting of a ditch) took place over an extended period. Archaeologists describe the isolable actions, events, and deposits resulting from such occupation of the land as ‘contexts’. Some materials retrieved from some of these contexts have been carefully selected by the archaeologists during their investigations to be datable using a variety of scientific dating techniques, and they provide individual site chronologies linked closely to the stratigraphic sequences involved. Repeated observed associations of different kinds of artefact with reliably dated contexts and site sequences allow comparative chronologies to be painstakingly constructed, and it is from this process that the possibility of a chronologically sound historical narrative for the Neolithic is gradually being built up. In these chapters entitled ‘narratives’, however, we are not only talking about the sketching out of a historical sequence, extremely important though it is. We are speaking also, if to a limited extent, about the teasing out of multiplicities of story from the material evidence.

Heterogeneity in fire severity within early season and late season prescribed burns in a mixed-conifer forest

2006 ◽  
Vol 15 (1) ◽  
pp. 37 ◽  
Author(s):  
Eric E. Knapp ◽  
Jon E. Keeley
Keyword(s):  
Sierra Nevada ◽  
Prescribed Burning ◽  
Fire Severity ◽  
Basal Area ◽  
Conifer Forest ◽  
Fuel Loading ◽  
Early Season ◽  
Late Season ◽  
Fuel Loads ◽  
In Fire

Structural heterogeneity in forests of the Sierra Nevada was historically produced through variation in fire regimes and local environmental factors. The amount of heterogeneity that prescription burning can achieve might now be more limited owing to high fuel loads and increased fuel continuity. Topography, woody fuel loading, and vegetative composition were quantified in plots within replicated early and late season burn units. Two indices of fire severity were evaluated in the same plots after the burns. Scorch height ranged from 2.8 to 25.4 m in early season plots and 3.1 to 38.5 m in late season plots, whereas percentage of ground surface burned ranged from 24 to 96% in early season plots and from 47 to 100% in late season plots. Scorch height was greatest in areas with steeper slopes, higher basal area of live trees, high percentage of basal area composed of pine, and more small woody fuel. Percentage of area burned was greatest in areas with less bare ground and rock cover (more fuel continuity), steeper slopes, and units burned in the fall (lower fuel moisture). Thus topographic and biotic factors still contribute to the abundant heterogeneity in fire severity with prescribed burning, even under the current high fuel loading conditions. Burning areas with high fuel loads in early season when fuels are moister may lead to patterns of heterogeneity in fire effects that more closely approximate the expected patchiness of historical fires.

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