OSMB Final Report: Task 3. Containment Strategies for Eurasian Watermilfoil Infested Central OR Lakes

In recent years, public awareness of aquatic invasive species (AIS) has increased considerably in Oregon and elsewhere in the western U.S.. News articles, boat inspection stations and AIS permit programs have drawn attention to the threat of aquatic invasive species, especially animals like zebra mussels (Dreissena polymorpha), quagga mussels (Dreissena bugensis), and New Zealand mudsnails (Potamopyrgus antipodarum). However, invasive aquatic plants are also capable of causing severe impacts and may similarly be transferred between waterbodies on boats, trailers or other equipment. Heavy infestations can hinder recreational use by motorized and non-motorized boats, snag fishing lines, threaten the safety of swimmers and water-skiers, restrict delivery of irrigation water or quality of drinking water, and negatively impact aquatic habitats used by wildlife. One such plant, Eurasian watermilfoil (Myriophyllum spicatum), is wide-spread in much of the United States, but has only recently been found in four waterbodies in central Oregon’s Deschutes and Jefferson counties. This plant and many other macrophytes are capable of surviving when fragments or seed are carried to new waterbodies by natural or human-mediated means. While certain natural vectors like water currents and birds cannot be controlled, a containment strategy aimed at reducing secondary spread of EWM to new waterways via boat traffic would benefit aquatic resources in the region. Towards that goal, we examined boat launches at known infested waterbodies to determine: the extent of Eurasian watermilfoil, whether physical control techniques would reduce boaters’ direct encounters with this weed, and general awareness of AIS and support for local control of EWM by lake users

Transitions in loneliness in later life: the role of social comparisons and coping strategies

This study explored the coping strategies and social comparisons used by older adults on different loneliness trajectories (decreased loneliness, stable loneliness and degenerating loneliness). The adaptive consequences of social comparison in later life are recognised as an important strategy for preserving life satisfaction regardless of age-related losses. Coping strategies are also important in managing loneliness. Narrative interviews were conducted with lonely older adults (N = 11) who had participated in Wave One of the Maintaining Function and Well-being in Later Life Study Wales (CFAS Wales). The study found key differences in the coping strategies employed by older adults on different loneliness trajectories. Differences in coping styles between those who reported decreased loneliness and those who were chronically lonely stemmed from perceptions as to whether loneliness was modifiable or not. Different types of social comparison were also found to modulate the loneliness experience. The findings indicate that higher-order strategies (problem, emotional and meaning focused) are not distinct entities but are part of a dynamic process. The management of loneliness in later life may be dependent on several factors, including older adults’ interpretations of the cause of loneliness. These interpretations will have implications for interventions aimed at alleviating chronic loneliness, where the focus may have to be on changing older adult's perceptions of unmodifiable loneliness

The Role of the Mujtahids of Tehran in the Iranian Constitutional Revolution 1905-9.

The thesis discusses the role of the mujtahids of Tehran in the Constitutional Revolution, considering their contribution both in ideas and organisation. The thesis is divided into eight chapters, the first of which deals with the relationship between the Lulama and the state, and the problem of accommodation with a ruler who was illegitimate according to Twelver Shi'ite law. The second chapter discusses the economic and social position of the 'ulama, concentrating on their financial resources, their legal duties, and their relationships with other groups, and attempting to show the ways in which they were subject to pressure. In the third chapter, the role of the Lulama, and particularly the mujtahids, in the coming of the Revolution is examined, especially their response to the centralisation of government, and the financial crisis at the turn of the century. The ideological contribution of the leading pro-constitutional mujtahid is discussed in the fourth chapter and an attempt made to identify the influences upon his ideas. Chapters five and seven deal with the role of the pro-constitutional mujtahids as the Revolution developed, considering their relationship with their following, the part they played in political organisation, and in the legitimising of the new Majlis, as well as their reactions to financial and legal reform. Chapters six and eight concentrate upon the arguments of the leading anti-constitutional mujtahid, and examine his relationship with the supporters of absolutism. The main themes of the conclusion are the contribution of both pro- and anti-constitutional mujtahids, ideologically and in organisation; their relations with their following; their attitude in general to reform; and the effect upon the Lulami of the long term trends, of which the Revolution may be said to form a part. The conclusion also draws in the work of other scholars on the subject, especially Hairi, Algar, Lambton and Arjomand

Aquatic Invasive Plant Surveys in the BLM Medford District During 2012

Aquatic plant surveys were conducted at 22 waterbodies located within the Bureau of Land Management’s Medford District during the summer of 2012. Sites included eleven lakes, ponds or reservoirs and six reaches along the Rogue and Applegate Rivers. Five sampling areas surveyed during 2010 and 2011 were revisited to determine the extent of known non-native species infestations, positively identify rare species, or verify the absence of an expected non-native species. Plant specimens were collected at up to 50 sites at each waterbody using plant rakes or by observation. The non-native submersed species curly leaf pondweed (Potamogeton crispus) and Eurasian x northern watermilfoil (Myriophyllum sibiricum x spicatum) were widespread throughout the District. Eurasian watermilfoil (Myriophyllum spicatum) was present at two sites. Emergent non-native aquatic species included parrotsfeather (Myriophyllum aquaticum), yellow flag iris (Iris pseudacorus), purple loosestrife (Lythrum salicaria), reed canary grass (Phalaris arundinaceae), floating primrose-willow (Ludwigia peploides) and slender waternymph (Najas gracillima)

Aquatic Plant Surveys in the Bureau of Land Management, Medford District, 2010-2011

The introduction of invasive aquatic plant species (IAPS) can cause significant ecological and economic harm. IAPS can displace native aquatic plant species, impair recreation, and degrade water quality. Early detection of new invasions can improve chances for successful eradication or containment to reduce the risk of IAPS spread. The Oregon Department of Agriculture (ODA) lists the most egregious offenders as “Noxious Weeds” which are defined as plants classified by the Oregon State Weed Board that are injurious to public health, agriculture, recreation, wildlife, or any public or private property (ODA 2011). Several IAPS classified as noxious have been detected within the Medford District of the Bureau of Land Management (BLM) in Southern Oregon including yellow floating heart (Nymphoides peltata) and yellow flag iris (Iris pseudacorus). During the summers of 2010 and 2011, IAPS surveys were conducted at selected reservoirs, lakes, and river boat launches within the Medford District to determine the extent of IAPS infestations as well as the distributions of native aquatic plant species. This report summarizes results of the surveys and provides recommendations for management of IAPS within the Medford District. Observations of any invasive aquatic animal species such as New Zealand mudsnails (Potamopyrgus antipodarum) are also reported

A Social Model of Loneliness: The Roles of Disability, Social Resources, and Cognitive Impairment

Purpose of the study: We consider the points at which cognitive impairment may impact on the pathway to loneliness for older people, through impeding social interaction with family and friends, or by interfering with judgments concerning satisfaction with relationships.Design and methods: We conceptualize a mediation model anticipating that social resources (LSNS-6) will mediate the pathway between disability (Townsend Disability Scale) and loneliness (De Jong Gierveld 6 item scale) and a moderated-mediation model in which we hypothesize that cognitive impairment (MMSE) will moderate the association between disability and social resources and between social resources and loneliness. To validate the hypothesized pathways, we draw on the CFAS Wales data set (N=3,593) which is a nationally representative study of community-dwelling people aged 65 and over in Wales Results: Disability had a significant indirect effect on loneliness through the mediating variable social resources. Cognitive impairment was significantly associated with social resources, but did not moderate the relationship between disability and social resources. Cognitive impairment had a significant impact on loneliness, and moderated the effect of social resources on loneliness. Implications: Social structures can (dis)empower people with cognitive impairment and lead to exclusion from social resources or impact on the social construction of ageing, cognitive impairment and dementia. The sense of self for an older person with cognitive impairment may be influenced by social norms and stereotypes, or through a temporal social comparison with an ‘earlier’ sense of self. We conclude that loneliness interventions should be theoretically-informed to identify key areas for modification

Size‑specific recolonization success by coral‑dwelling damselfishes moderates resilience to habitat loss

Increasing degradation of coral reef ecosystems and specifically, loss of corals is causing significant and widespread declines in the abundance of coral reef fishes, but the proximate cause(s) of these declines are largely unknown. Here, we examine specific responses to host coral mortality for three species of coral-dwelling damselfishes (Dascyllus aruanus, D. reticulatus, and Pomacentrus moluccensis), explicitly testing whether these fishes can successfully move and recolonize nearby coral hosts. Responses of fishes to localized coral loss was studied during population irruptions of coral feeding crown-of-thorns starfish, where starfish consumed 29 (34%) out of 85 coral colonies, of which 25 (86%) were occupied by coral-dwelling damselfishes. Damselfishes were not tagged or individually recognizable, but changes in the colonization of different coral hosts was assessed by carefully assessing the number and size of fishes on every available coral colony. Most damselfishes (> 90%) vacated dead coral hosts within 5 days, and either disappeared entirely (presumed dead) or relocated to nearby coral hosts. Displaced fishes only ever colonized corals already occupied by other coraldwelling damselfishes (mostly conspecifics) and colonization success was strongly size-dependent. Despite movement of damselfishes to surviving corals, the local abundance of coral-dependent damselfishes declined in approximate accordance with the proportional loss of coral habitat. These results suggest that even if alternative coral hosts are locally abundant, there are significant biological constraints on movement of coral-dwelling damselfishes and recolonization of alternative coral habitats, such that localized persistence of habitat patches during moderate or patchy disturbances do not necessarily provide resilience against overall habitat loss

Variation in incidence and severity of injuries among crown-of-thorns starfish (Acanthaster cf. solaris) on Australia's Great Barrier Reef

Despite the presence of numerous sharp poisonous spines, adult crown-of-thorns starfish (CoTS) are vulnerable to predation, though the importance and rates of predation are generally unknown. This study explores variation in the incidence and severity of injuries for Acanthaster cf. solaris from Australia's Great Barrier Reef. The major cause of such injuries is presumed to be sub-lethal predation such that the incidence of injuries may provide a proxy for overall predation and mortality rates. A total of 3846 Acanthaster cf. solaris were sampled across 19 reefs, of which 1955 (50.83%) were injured. Both the incidence and severity of injuries decreased with increasing body size. For small CoTS (60% of individuals had injuries, and a mean 20.7% of arms (±2.9 SE) were affected. By comparison, 450 mm total diameter) CoTS had injuries, and, among those, only 8.3% of arms (±1.7 SE) were injured. The incidence of injuries varied greatly among reefs but was unaffected by the regulations of local fisheries

Aquatic Invasive Species Surveys of Pacificorp’s North Umpqua River Impoundments

Ten North Umpqua Hydroelectric Project impoundments were surveyed for aquatic invasive species during the summer of 2012. One non-native submersed aquatic vegetation species (Potamogeton crispus) and one non-native snail species (Radix auricularia) was detected. No crayfish or mussel veligers were collected and no non-native zooplankton species were encountered