Despite a recent report of high concentrations of microplastics and microfibers in the mesopelagic waters of Monterey Bay National Marine Sanctuary (MBNMS), little is known about these particles in ...surface waters. From 2017 to 2019, we sampled two nearshore and two offshore locations within MBNMS using a manta trawl and analyzed these samples for microplastics and microfibers. We found an average concentration of 1.32 ± 0.70 (SE) particles per m3. We found the highest concentration of particles closest to shore, and the lowest concentration above the remote Davidson Seamount. Fiber-like debris was more common in offshore, as compared to nearshore, sites. Overall, particles in our samples were primarily buoyant synthetic polymers, including polypropylene and polyethylene. Our results provide baseline data on the degree of microplastic and microfiber pollution in MBNMS surface waters and confirm that this pollution can be found in waters from the surface to at least 1000 m depth.
•First extensive sampling of MBNMS surface water for microplastics and microfibers (i.e., ‘particles’).•Nearshore Santa Cruz had highest concentrations (3.21particles/m3); offshore Davidson Seamount had lowest (0.26 particles/m3)•There was a higher proportion of microfibers at offshore sites compared to nearshore sites.•Polypropylene and polyethylene were most common polymers identified using FTIR.•Overall, concentrations (1.32 particles/m3) were similar to other studies of surface seawater both regionally and globally.
Throughout antiquity patients sought relief and healing from their afflictions in the sanctuaries of Asclepius, the God of healing. The Asclepian healing cult included sacrifices, ablutions and ...incubation. In their dreams, the patients received therapeutic instructions. But not only miraculous cures occurred in the Asclepieia, nor were these sacred sites the last refuge of the seriously ill. Using selected examples from the Roman Imperial Period, Florian Steger outlines the healthcare provided in the prominent Asclepian sanctuaries – Epidaurus and Pergamum in particular – and demonstrates that this healthcare was on a par with the contemporary medical culture. Ancient epigraphic healing reports and the patient journal of the celebrated orator Publius Aelius Aristides paint a vivid picture of the daily treatments. The medicine of Asclepius clearly formed an integral part of the Roman Empire's multifaceted healthcare market.
Rebellion, insurgency, civil war-conflict within a society is customarily treated as a matter of domestic politics and analysts generally focus their attention on local causes. Yet fighting between ...governments and opposition groups is rarely confined to the domestic arena. "Internal" wars often spill across national boundaries, rebel organizations frequently find sanctuaries in neighboring countries, and insurgencies give rise to disputes between states.
InRebels without Borders, which will appeal to students of international and civil war and those developing policies to contain the regional diffusion of conflict, Idean Salehyan examines transnational rebel organizations in civil conflicts, utilizing cross-national datasets as well as in-depth case studies. He shows how external Contra bases in Honduras and Costa Rica facilitated the Nicaraguan civil war and how the Rwandan civil war spilled over into the Democratic Republic of the Congo, fostering a regional war. He also looks at other cross-border insurgencies, such as those of the Kurdish PKK and Taliban fighters in Pakistan. Salehyan reveals that external sanctuaries feature in the political history of more than half of the world's armed insurgencies since 1945, and are also important in fostering state-to-state conflicts.
Rebels who are unable to challenge the state on its own turf look for mobilization opportunities abroad. Neighboring states that are too weak to prevent rebel access, states that wish to foster instability in their rivals, and large refugee diasporas provide important opportunities for insurgent groups to establish external bases. Such sanctuaries complicate intelligence gathering, counterinsurgency operations, and efforts at peacemaking. States that host rebels intrude into negotiations between governments and opposition movements and can block progress toward peace when they pursue their own agendas.
Public lands managed for wildlife frequently provide various forms of sanctuary to increase residency times and allow access to energetic and other habitat resources for waterfowl. The influence of ...sanctuary type and disturbance regime on resource use and fine‐scale movements of waterfowl has not been investigated extensively using currently available transmitter technologies. We examined mallard (Anas platyrhynchos) use of various types of waterfowl sanctuary and non‐sanctuary areas in the Mississippi Alluvial Valley region of eastern Arkansas, USA, during winters of 2019–2021. We deployed 105 global positioning system transmitters on mallards at 4 closed‐access spatial sanctuaries on or adjacent to Dale Bumpers White River National Wildlife Refuge. We used hourly transmitter locations to examine mallard use of public sanctuary areas, public hunt areas, and private lands using integrated step selection analysis. Public sanctuary areas provided varying levels of protected status, public hunt areas allowed for varying levels of hunting intensity by duck hunters, and private lands were open to waterfowl hunting and other forms of private uses but may or may not have been hunted at any specific frequency. Mallards selected spatial sanctuary and avoided public hunt areas, other sanctuary types, and private lands during the day. In contrast, mallards selected for private lands over spatial sanctuary at night. Mallards tended to avoid areas that allowed duck hunting or used them during the night when risk of harvest mortality was removed. After the hunting season closed, mallards began using areas that previously allowed duck hunting during the day, suggesting that risk was the primary factor influencing site use. Moreover, mallards were 1.6 times more likely to use public daily hunt areas and 2.1 times more likely to use private lands potentially open to hunting during the day than spatial sanctuary 2 weeks after the close of duck hunting season in February. Spatial sanctuaries appear more effective in influencing mallard use than temporal sanctuaries or inviolate sanctuaries, which are commonly used by state and federal agencies. Partial daily, daily, or activity‐specific (e.g., no hunting past noon, no hunting 3 days/week, no waterfowl hunting) closures to encourage mallard use of temporal sanctuaries do not appear to reduce the perceived harvest‐related risk to mallards enough for them to view these areas as accessible or significantly increase their use.
Public lands managed for wildlife frequently provide various forms of designated sanctuary to increase residency times and allow access to energetic and other habitat resources for waterfowl; however, the influence of sanctuary type and disturbance regime on resource use and fine‐scale movements of waterfowl has not been investigated extensively using currently available transmitter technologies. We examined mallard use of various types of designated waterfowl sanctuary and non‐sanctuary areas in the Mississippi Alluvial Valley region of eastern Arkansas, USA, during the winters of 2019, 2020, and 2021. Mallards tended to avoid areas that allowed duck hunting or used them during the night when risk of harvest mortality was removed; after the hunting season closed, mallards began using areas that previously allowed duck hunting during the day, suggesting that risk was the primary factor influencing site use.
Mangroves are halophytic vegetation comprising the tropics. Bhitarkanika Wildlife Sanctuary, being a local hotspot of mangrove, acts as carbon sink for mitigating increased CO
2
level in the ...atmosphere. The study estimated total biomass and total carbon in five selected stations of this Wildlife Sanctuary in reference to relevant ambient parameters of water (temperature, pH, and salinity) and soil (temperature, pH, electrical conductivity, bulk density, organic carbon, organic matter, and texture) seasonally. The average values for total biomass and total carbon measured in this study are 866.67 ± 166.10 t ha
−1
and 444.68 ± 83.70 t ha
−1
, respectively. The average soil organic carbon recorded was 3.73 ± 2.10 t ha
−1
and average litter carbon was 0.59 ± 0.20 t ha
−1
, respectively. Among the components, above-ground biomass constitutes 55–70% of total biomass and total carbon. Significant positive relationship between biomass (above-ground biomass, below-ground biomass, litter biomass, total biomass) and carbon (above-ground carbon, below-ground carbon, litter carbon, soil organic carbon, and total carbon) was obtained with respect to selected physico-chemical variables which proved the significant effect of change in biomass and carbon to changing parameters of the ambient media in the study area. The analysis of variance computed between season and station has also proved the above phenomenon. The study revealed the mangrove carbon storage potential of 21 mangrove species, which is at par with the biomass of South-east Asia and South west Pacific countries. Hence, mangrove conservation programs like REDD+ can be adopted in this wildlife sanctuary being the 2nd largest mangrove patch of India after Sundarbans.
The North American Waterfowl Management Plan (NAWMP) recognizes waterfowl hunters and non‐consumptive users as important stakeholders to sustain waterfowl populations through economic and political ...support for habitat conservation initiatives. Opportunities to shoot at and harvest ducks are key determinants of achievement‐oriented hunt satisfaction and quality. Therefore, identifying factors influencing harvest opportunity would help hunters and wildlife managers identify optimal days afield and promote hunter recruitment, retention, and reactivation (R3) efforts in support of NAWMP. Waterfowl extensively use spatial sanctuaries during hunting seasons, especially diurnally, which could limit their perceived availability to hunters. Thus, a possible management action to support R3 is allowing limited public access on sanctuaries, which could offer diverse recreational opportunities for non‐consumptive users and potentially increase harvest opportunities for hunters in traditional hunting areas if the limited disturbance caused waterfowl to leave sanctuaries. Therefore, we evaluated to what extent experimental sanctuary disturbance, landscape characteristics, and weather influenced local harvest opportunities. We conducted disturbance treatments including travel by a covered truck (i.e., truck with enclosed cab), a pedestrian on foot, and an uncovered vehicle (e.g., motor boat or all‐terrain vehicle ATV). To measure harvest opportunity, we used autonomous recording units (ARU) to enumerate daily shotgun volleys at a landscape‐scale across western Tennessee, USA, during 2019–2021 waterfowl hunting seasons. We identified 339,391 distinct shotgun volleys (
x
¯ $\bar{x}$ = 73 shotgun volleys/day/ARU). Shotgun volleys decreased 50% within 2 weeks of opening day and did not notably increase for the remainder of the hunting season. Contrary to our predictions, sanctuary disturbance decreased harvest opportunity. Specifically, the pedestrian disturbance and covered vehicle disturbance decreased daily shotgun volleys by 32% and 31%, respectively. Additionally, harvest opportunity decreased 20% with every 5‐km increase in distance from a sanctuary. Harvest opportunity increased 2% for every 1°C decrease from mean low temperatures and 9% with every 10‐hPa increase in barometric pressure from the previous day. Conversely, harvest opportunity was unaffected by changes in cloud cover, daily precipitation, waterfowl abundance, or surface water inundation. Our results suggest disturbing sanctuaries decreases harvest opportunity and, in turn, may reduce hunt quality and satisfaction. If increasing harvest opportunity is a primary management objective, we recommend limiting sanctuary disturbance to maximize local harvest opportunities. Furthermore, greater harvest opportunity nearer sanctuaries indicates that additional disturbance‐free areas may increase local harvest opportunities and hunter satisfaction.
We evaluated how sanctuary disturbance, landscape characteristics, and weather influenced local harvest opportunities by using passive acoustic recording to enumerate daily shotgun volleys. Harvest opportunity (i.e., number of shotgun volleys) was greatest closer to sanctuaries and decreased when sanctuaries were disturbed. If increasing local harvest opportunity is a goal, our results suggest managers should keep sanctuaries as disturbance‐free as possible.
We define an ecosanctuary in a New Zealand context as 'a project larger than 25 ha implementing multi-species, pest mammal control for ecosystem recovery objectives, and with substantial community ...involvement'. We present attributes of 84 projects meeting this definition, including three lacustrine islands, 16 marine islands, seven ring-fenced ecosanctuaries, seven peninsula-fenced ecosanctuaries and 51 unfenced mainland ecosanctuaries. Ecosanctuaries have biological and social objectives, and some have returned threatened, previously extirpated taxa to the New Zealand mainland. Increasingly, these intensively managed sites are being embedded in human-altered landscapes with low levels of pest control - a 'core and buffer' system. Most community groups that establish ecosanctuaries lack the technical expertise, resources and mandate to undertake regional or national prioritisation. There is a strong need for agency leadership of this, and to develop best practice pest control, pest monitoring and biodiversity outcome monitoring tools, as goals for national restoration of biodiversity rapidly expand.
PDF
