Habitat preferences, spatial distribution and current population status of endangered giant flower Amorphophallus titanum

2022 ◽  
Author(s):  
Angga Yudaputra ◽  
Izu Andry Fijridiyanto ◽  
Yuzammi ◽  
Joko Ridho Witono ◽  
Inggit Puji Astuti ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Habitat Preferences ◽  
Population Status ◽  
Current Population

scholarly journals Historical changes in land use influence current habitat preferences of large herbivores

2019 ◽  
Vol 34 (10) ◽  
pp. 2251-2259 ◽  
Author(s):  
Kajetan Perzanowski ◽  
Maciej Januszczak ◽  
Rafał Łopucki
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Habitat Preferences ◽  
Field Research ◽  
Study Data ◽  
European Bison ◽  
Large Herbivore ◽  
Large Herbivores ◽  
Historical Changes ◽  
Effective Factor

Abstract Context Predicting habitat use patterns is a key issue in the management of large herbivore populations. Particularly, indicators providing a model of the spatial distribution of a population in a simple way, without the necessity of laborious field research, are still being sought. Analysis of historical landscape changes can be one of such predictive tools. Objectives We tested the hypothesis that historical changes in land use can be used as an effective factor enabling prediction of spatial distribution. As a case study, data on habitat preferences of European bison Bison bonasus (wisents) were used. Methods Spatial distribution of 17302 records of the presence of wisents, collected over the period of 10 years, was compared using contemporary and historical habitat maps for the Bieszczady Mts. (Poland). The area of approx. 87 thousand ha was selected, where the density of human population decreased over four times, and the percentage of forests increased from over 30% to almost 80% due to land abandonment. Results Wisents were recorded significantly more frequently in parts of the forest that in the past were used for agriculture. We found that identification of parts of the forest overgrowing former cultivated fields makes it possible to predict the spatial distribution of wisent herds with very high probability. Conclusions Information on historical changes in land use can be used as a simple and effective factor enabling prediction of habitat selection by wisents. Such an approach can potentially be useful for similar assessments of other large wild herbivores.

scholarly journals Current Population Status and Activity Pattern of Lesser Flamingos (Phoeniconaias minor) and Greater Flamingo (Phoenicopterus roseus) in Abijata-Shalla Lakes National Park (ASLNP), Ethiopia

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Tewodros Kumssa ◽  
Afework Bekele
Keyword(s):  
Population Size ◽  
Activity Pattern ◽  
Habitat Preference ◽  
Time Of Day ◽  
Dry Season ◽  
Population Status ◽  
Wet Season ◽  
Current Population ◽  
Dry Seasons ◽  
Wet And Dry Seasons

A study of the population status, habitat preference, and activity pattern of nonbreeding flamingos was carried out in Lakes Abijata, Shalla, and Chitu, part of the Great Rift Valley, Ethiopia, from 2011 to 2013. The current population status and habitat preference of flamingos in the area are still poorly known. Likewise, data on diurnal and seasonal activity pattern of the species are scarce and this leads to the misunderstanding of how Flamingos use local wetlands throughout the different seasons. Data regarding population size and activity pattern were gathered during the wet and dry seasons. Point-count method was used to estimate the population size. Behaviors were recorded using scan sampling techniques. A total of 53671 individuals representing two species of flamingo were counted during both wet and dry seasons from the three lakes. There were more flamingos during the dry season than the wet season in Lake Abijata contrary to Lakes Shalla and Chitu during the wet season. Lesser flamingos (Phoeniconaias minor) were the most abundant species comprising 95.39%, while Greater Flamingos (Phoenicopterus roseus) accounted for 4.61% of the total population. Lake Abijata is the major stronghold of Lesser Flamingos in the area. There was significant variation in the mean number of both species during the wet and dry season in the different study sites of the lake, respectively. The species were known to use varied habitats within the lakes. The Lesser Flamingo mainly preferred the shoreline and mudflat areas of the lakes. However, Greater Flamingo on several occasions showed preference to offshore area of the lakes. Seasonal average flock sizes were not similar between the species. There was a strong relationship between time allocated to each activity and time of day. Feeding activity varied among daylight hours and was higher in the evening (76.5%) and late morning (74.56%) and least during midday (54%). Some variations in activity breakdown were observed between time blocks and season. Conservation efforts in the park should include the wild flora and fauna not only of the land but also of the aquatic systems. The information in this study will be very useful for the future management of the species in the area.

scholarly journals Preferensi Habitat dan Distribusi Spasial Yuwana Rajungan (Portunus pelagicus) di Perairan Pesisir Lampung Timur, Provinsi Lampung

2020 ◽  
Vol 10 (2) ◽  
pp. 183-197
Author(s):  
Muhamad Radifa ◽  
Yusli Wardiatno ◽  
Charles P.H. Simanjuntak ◽  
Zairion Zairion
Keyword(s):  
Spatial Distribution ◽  
Coastal Waters ◽  
Sustainable Management ◽  
Habitat Preferences ◽  
Coastal Region ◽  
Coastal Habitat ◽  
Portunus Pelagicus ◽  
Suitability Index ◽  
High Preference ◽  
Abiotic And Biotic Factors

Information on habitat preferences of the blue swimming crab (BSC) juvenile and its spatial distribution is one of the factors behind the successfulness of its sustainable management. This information is needed to provide input for management strategy by considering juvenile crabs and their habitat as important aspect. The purpose of this study is to elucidate habitat preferences, abundance and biomass distribution of BSC juvenile in the east Lampung coastal waters. The research was conducted in September-October 2018, which was located in east Lampung coastal waters, Province Lampung. Spatial distribution through estimation of abundance and biomass of BSC juvenile  were relatively high and concentrated in the Gambas and Wako regions at stratification of 2-4 miles from the coastline. The BSC juvenile does not appear to have a high preference to the Kuala Penet coastal habitat condition; it is considered because of low value of abundance, biomass, and Habitat suitability index (HSI). The value of HSI in the Kuala Penet Coastal region is also lower than other locations due to abiotic and biotic factors for supporting the crabs at juvenile stage.

scholarly journals Population status of endemic tree kokoleceran (Vatica bantamensis) in Ujung Kulon National Park, Indonesia

2018 ◽  
Vol 20 (1) ◽  
pp. 296-302
Author(s):  
IYAN ROBIANSYAH ◽  
DODO DODO ◽  
ARIEF HAMIDI
Keyword(s):  
National Park ◽  
Conservation Status ◽  
Habitat Preferences ◽  
Iucn Red List ◽  
Mature Stage ◽  
Cluster Sampling ◽  
Population Status ◽  
Threatened Plants ◽  
Area Of Occupancy ◽  
Surrounding Areas

Robiansyah I, Dodo, Hamidi A. 2019. Population status of endemic tree kokoleceran (Vatica bantamensis) in Ujung Kulon National Park, Indonesia. Biodiversitas 20: 296-302. Kokoleceran (Vatica bantamensis) is an endemic tree found only in Ujung Kulon National Park (UKNP), Banten, Indonesia, and is classified as Endangered by IUCN Red List. To develop effective conservation measures of threatened plants, current information on population status and distribution of the species is needed. Thus in the present study, a targeted survey of kokoleceran was conducted in UKNP aiming at mapping the distribution of the species, measuring current population size and structure, assessing the habitat preferences, and identifying threats to the species. Using a non-random adaptive cluster sampling, a total of 27 clusters harboring 280 individuals of kokoleceran was located, of which 20 % were in mature stage. All these individuals were only found in Mount Payung and its surrounding areas, and formed an inverse-J-shaped population structure pattern. The species was estimated to have an area of occupancy and extent of occurrence of 8 km2. The invasive langkap palm (Arenga obtusifolia, Arecaceae) was identified as the main threat for kokoleceran. Based on these results, kokoleceran appears to more than justify its conservation status of Critically Endangered B1ab(iii,v) +2ab(iii,v); C2a(ii).

Bobcat Population Status and Management in North America: Evidence of Large-Scale Population Increase

2010 ◽  
Vol 1 (2) ◽  
pp. 169-174 ◽  
Author(s):  
Nathan M. Roberts ◽  
Shawn M. Crimmins
Keyword(s):  
United States ◽  
North America ◽  
Wildlife Management ◽  
Large Scale ◽  
The United States ◽  
Lynx Rufus ◽  
Population Increase ◽  
Population Status ◽  
Current Population ◽  
Monitoring Protocols

Abstract Bobcat Lynx rufus populations are thought to be increasing in North America; however, little information exists on their current population status. In the United States, management and monitoring of bobcat populations is the responsibility of state wildlife management agencies. We surveyed state wildlife management agencies in each of the 48 contiguous states regarding the current population status, distribution, and monitoring protocols of bobcats within each respective jurisdiction. We also surveyed the governments of Mexico and Canada regarding bobcat population status within their jurisdictions. We received responses from 47 U.S. states, Mexico, and 7 Canadian provinces. Responses indicate that bobcats occur in each of the contiguous states except for Delaware. Populations were reported to be stable or increasing in 40 states, with 6 states unable to report population trends and only 1 state (Florida) reporting decreases in bobcat populations. Of the 47 states in which bobcats occur, 41 employ some form of population monitoring. Population density estimates were available for 2,011,518 km2 (33.6%) of the estimated bobcat range in the United States, with population estimates between 1,419,333 and 2,638,738 individuals for this portion of their range and an estimated 2,352,276 to 3,571,681 individuals for the entire United States. These results indicate that bobcat populations have increased throughout the majority of their range in North America since the late 1990s and that populations within the United States are much higher than previously suggested.

scholarly journals Spatial distribution and habitat preferences of demersal fish assemblages in the southeastern Weddell Sea (Southern Ocean)

Polar Biology ◽  
2019 ◽  
Vol 42 (5) ◽  
pp. 1025-1040 ◽  
Author(s):  
Mario La Mesa ◽  
Dieter Piepenburg ◽  
Santiago E. A. Pineda-Metz ◽  
Emilio Riginella ◽  
Joseph T. Eastman
Keyword(s):  
Spatial Distribution ◽  
Southern Ocean ◽  
Fish Assemblages ◽  
Habitat Preferences ◽  
Demersal Fish ◽  
Weddell Sea

Conservation status and biology of the Ultramarine Lorikeet Vini ultramarina in the Marquesas Islands, French Polynesia

2021 ◽  
pp. 1-16
Author(s):  
TAMMY DOUKAS ◽  
MARK ZIEMBICKI
Keyword(s):  
Conservation Status ◽  
Habitat Preferences ◽  
Rattus Rattus ◽  
French Polynesia ◽  
Population Estimates ◽  
Population Status ◽  
Marquesas Islands ◽  
Conservation Implications ◽  
Over Exploitation ◽  
Black Rats

Summary Classified as Critically Endangered, the Ultramarine Lorikeet Vini ultramarina is one of the world’s most threatened lorikeet species. Endemic to the Marquesas Islands in French Polynesia, the species was formerly distributed over most islands in the archipelago, but is today found primarily on the island of Ua Huka, its range having contracted significantly in recent decades. Habitat alteration and loss, and over-exploitation of natural resources, are cited as impacting the Ultramarine Lorikeet, but the influence of introduced black rats Rattus rattus as predators has been implicated as the primary threat to the species. To assess population status and document aspects of the species biology, including habitat preferences and diet, we conducted the first systematic surveys of the species during two independent surveys spaced seven years apart (2002 and 2009). Population estimates of 2,011 ± 284 (in 2002) and 1,922 (in 2009) individuals on Ua Huka suggest the population was relatively healthy and stable between these periods. However, surveys and searches of other islands in the species’ contemporary range, where black rats occur, either failed to document the species or noted very few individuals. These findings highlight the critical importance of Ua Huka as a rat-free refuge and the value of our surveys as baseline estimates of the population status of the species. We discuss the conservation implications of our findings and propose recommendations to secure the species’ future survival.

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