Abstract As wildfire becomes increasingly frequent, many serotinous plant populations risk local extirpation if fire recurs prior to sufficient seed accumulation in the canopy (i.e., “immaturity risk”). Following two 2018 wildfires northwestern California, we studied viability, cone production, and postfire regeneration of a conifer, knobcone pine ( Pinus attenuata ), with stand ages (time since fire) ranging from 6 79 years. Cone density per tree was more strongly associated diameter than...

This study develops a site specific burn severity modelling using remote sensing techniques to develop patterns on vegetation and soil in the fire prone region of Palo Verde National Park Guanacaste, Costa Rica. Terrain physical features, cover, scorched characteristics were examined risk model quantify probable burned areas. Spectral signatures affected areas captured through multi-spectral analysis; i.e., Normalized Burn Ratio (NBR), Landsat derived differenced (dNBR) relativized dNBR...

Developing positive attitudes by upgrading the environmental literacy level is very important to protect nature from anthropogenic pressures. This study evaluates existing knowledge, awareness, attitude and behavior, perceived issues, solutions of undergraduates on major issues two national universities with different teaching methods Open University Sri Lanka (OUSL: open distance learning) Peradeniya (UP: conventional). A questionnaire survey (29 structured 04 open-ended items) was adapted...

Bats perform critical ecosystem functions, including the pollination, seed dispersal, and regulation of invertebrate populations. Yet, bat populations are declining worldwide primarily due to habitat loss other anthropogenic stressors. Thus, studies on ecology, particularly environmental determinants occupancy, paramount their conservation. High mobility, nocturnal behavior, roosting site selection bats make conventional surveys challenging. Moreover, little is known about geographic...

High-resolution unmanned aerial vehicle (UAV) multi-spectral sensor images can provide valuable information for mapping forest areas that have recently been burned.In this study, we investigate the use of captured with a UAV to evaluate burn severity in affected by fires Gumi-si, South Korea.Fire classification was performed using two supervised learning algorithms, maximum likelihood (ML) and spectral angle mapper (SAM).Three indices, namely, normalized difference vegetation index (NDVI),...

Unmanned aerial vehicles (UAVs) are being widely used to monitor microtopographic and vegetation changes in coastal habitats using remote sensing techniques. Sand dune vital ecosystems along the North coast of Humboldt County California. This study was conducted at Manila Dunes, west Coastal Nature Center, Manila, Various factors influence movements, including vegetative stabilization creation social trails. The purpose this paper is understand movements relation vs. established trails,...

This study investigated the relationships amongst floristic, soil and climatic parameters their control on carbon sequestration (CS) in two selected forest stands of Sri Lanka. Representative sampling sites were from dry zone (Sigiriya sanctuary) wet (Udawattakele reserve) Litter samples collected each site randomly monthly intervals to cover an annual cycle. Plant biomass stocks calculated using standard equations. Soil determined by chemical oxidation loss ignition (LOI) methods. Principle...

Science-based forest management requires quantitative estimation of attributes traditionally collected via sampled field plots in a inventory program. Three-dimensional (3D) remotely sensed data such as Light Detection and Ranging (lidar), are increasingly utilized to supplement even replace field-based inventories. However, lidar remains cost prohibitive for smaller areas repeat measurements, often limiting its use single acquisitions large contiguous areas. Recent advancements unpiloted...

The Ma-le'l Dunes are located at the upper end of North Spit Humboldt Bay, California and home to a range plant animal species. goal this study was determine which classification method most accurate in identifying dune features when performed on large, diverse area. data sources used for were an orthomosaic image (2017) with 14 cm spatial resolution NAIP images (2012, 2014, 2016) 1 m resolution. A DJI Mavic Pro Unmanned Aerial Vehicle (UAV) fly 31 acre plot height about 80 m. from flight...

Abstract As many as 500,000 waterfowl reside in California, USA, during summer, but little is known about the availability or quality of their habitats. Wetland size and distribution serve proximate cues for habitat selection by breeding other parts North America such Prairie Pothole Region. In heavily modified landscapes California's Central Valley, disturbance from factors like crop cultivation urban development may limit access, affect survival, decrease reproductive success. Water...

Abstract A sufficient knowledge on prehistoric culture and habitat of earliest Homo sapiens (Balangoda man) is available in Batadomba-lena cave, a noticeable rock shelter lowland rainforest southwestern Sri Lanka goes upto Pleistocene Holocene eras. Late inhabitants Batadombalena cave’s foraged for broad spectrum plant mainly arboreal animal resources such as, monkeys, squirrels snails etc. Archaeo-faunal evidence would help to describe the man eating behavior as well availability nature...

The study aims to examine the environmental literacy level of G.C.E A/L students (comparable British Advanced Level) in Kandy District, Sri Lanka, and evaluate environment modules embedded into curriculum. Furthermore, we find relationships between socioeconomic discipline levels. A survey with a sample 300 was selected randomly from four different disciplines, 25 each subject (biological science, mathematics, arts, commerce) three types schools (Public, Private, International). piloted,...

Fine roots in forest soils have important implications for global carbon (C) balance, but processesunderlying this C sink are not well understood. This study evaluates year round dynamics of fine ina tropical dry mixed evergreen and an arboretum the zone Sri Lanka. Monthly soil coresamples (up to 25 cm depth) were collected randomly cover a whole annual cycle two sites. Thesoils air dried, sieved (< 2 mm), (≤ mm) separated by handpicking coupledwith water floating technique. Then, root...

This study examines vegetation, carbon sequestration, and spatial temporal changes of green space at the premises Open University Sri Lanka (OUSL). The primary objective this is to examine floral diversity OUSL that was rehabilitated from a landfill site determine suitable trees for sites based on growth performance biomass stocks. girth height plants ⩾5 cm dbh were measured estimate stocks each individual tree. GPS coordinates tree taken mapping. Urban spaces extracted Satellite view Google...

Monitoring coastal ecosystem resilience for climatic and/or anthropogenic vulnerabilities is challenging with moderately resolution Landsat images. A simple, low-cost Kite Aerial Photograph platform (KAP) was vital to obtain high-resolution images a small area develop GIS models. This study examines post-tsunami relief in two shrub and mangrove terms of vegetation bioshield mass sea level rise perspectives. KAP created using light-weight automatic cameras dual bandpass Red-NIR filters,...

Land-use change is a predictable and principal driving force of potential environmental changes on all spatial temporal scales. A land-use model tool that supports the analysis sources consequences dynamics. This study aims to assess spatiotemporal occurred during 1990–2020 in municipal council limits Batticaloa. land modeler has been used as an innovative planning decision support system this study. The main satellite data were retrieved from Landsat 1990, 2000, 2010, 2020. For...

Abstract Understanding the ecological distribution range of exotic trees in an arboreal ecosystem is essential to managing natural forest resources sustainably. Forest resource mapping can be applied as a powerful tool identification threat patterns, and monitoring ongoing changes associated with landscape. This study offers insight on Russian-olive its impact spatially bound ecosystem, namely, Bismarck–Mandan Wildland–Urban Interface (BMWUI). Data from National Agricultural Imagery Program...

<strong>Background</strong>: Sexually Transmitted Infections (STIs) are a major global public health issue leading to many physical, psychological and social consequences. Sri Lanka has low prevalence of HIV needs target key population (KPs) at higher risk infection. This study examines the district wise STI incidences KPs in evaluate trends relationships STIs provide recommendations for further investigations. <strong>Methods</strong>: Data were extracted from National STD/AIDS Control...

Repeated slash and burn cultivation creates wasteland with thorny shrubs, which then takes a long time to become secondary forests through serial stages of succession. Assisted natural regeneration silvicultural management is useful restoration method accelerate This survey evaluates the effectiveness simple for rehabilitation degraded lands productive forest, thereby increasing floristic wealth. Field-based comparative analyses composition were carried out at silviculturally managed forest...

Providing physical protection to wildlife is among the most high-risk professions in conservation sector as it directly associated with prevention of crimes.In Sri Lanka, Department Wildlife Conservation primary government agency responsible for long-term and biological diversity.Since establishment department October 1949, there have been casualties line duty field officers DWC.Here, we examine nature conditions that led demise these whilst on duty.From 1949 December 2020, at least 80...

Abstract An ecological survey was carried out for the Iriyawetiya freshwater wetland in Sri Lanka. The goal to characterize this unique wetland, about which little information available. areal extent of 87 ha, with a marshy cover approximately 52 ha. Water samples assess physico‐chemical parameters were collected at monthly intervals six months from four study sites along stream length through wetland. A 1 m × 0.5 quadrat used vegetation sampling 5 50‐m transect, aligned perpendicular...

The prevalence of black bear (Ursus americanus) bark stripping in commercial redwood (Sequoia sempervirens (D. Don) Endl.) timber stands has been increasing recent years. This is a threat to production because the deleterious effects on tree fitness. study sought unveil remote sensing method detect these damaged trees early and map their spatial patterns. By developing timely monitoring method, forest companies can manipulate harvesting routines adapt consequences problem. We explored...