Pond-Breeding Amphibian Species Distributions in a Beaver-Modified Landscape, Acadia National Park, Mount Desert Island, Maine

In order to maintain pond-breeding amphibian species richness, it is important to understand how both natural and anthropogenic disturbances affect species assemblages and individual species distributions both at the scale of individual ponds and at a larger landscape scale. The goal of this project was to investigate what characteristics of ponds and the surrounding wetland landscape were most effective in predicting pond-breeding species richness and the individual occurrence of wood frog (Rana sylvatica), bullfrog (Rana catesbeiana) and pickerel frog (Rana palustris) breeding sites in a beaver-modified landscape and how this landscape has changed over time. The wetland landscape of Acadia National Park was historically modified by the natural disturbance cycles of beaver (Castor cazadensis), and since their reintroduction to the island in 1921, beaver have played a large role in creating and maintaining palustrine wetlands. In 2000 and 2001, I studied pond-breeding amphibian assemblages at 71 palustrine wetlands in Acadia National Park, Mount Desert Island, Maine. I determined breeding presence of 7 amphibian species and quantified 15 variables describing local pond conditions and characteristics of the wetland landscape. I developed a priori models to predict sites with high amphibian species and used model selection with Akaike's Information Criterion (AIC) to identify important variables. Single species models were also developed to predict wood frog, bullfrog and pickerel frogs breeding presence. The variables for wetland connectivity by stream corridors and the presence of beaver disturbance were the most effective variables to predict sites with high amphibian richness. Wood frog breeding was best predicted by local scale variables describing temporary, fishless wetlands and the absence of active beaver disturbance. Abandoned beaver sites provided wood frog breeding habitat (70%) in a similar proportion to that found in non beaver-influenced sites (79%). In contrast, bullfrog breeding presence was limited to active beaver wetlands with fish and permanent water, and 80% of breeding sites were large (≥2ha in size). Pickerel frog breeding site selection was predicted best by the connectivity of sites in the landscape by stream corridors. Models including the presence of beaver disturbance, greater wetland perimeter and greater depth were included in the confidence set of pickerel frog models but showed considerably less support. Analysis of historic aerial photographs showed an 89% increase in the total number of ponded wetlands available in the landscape between the years of 1944 and 1997. Beaver colonization generally converted forested wetlands and riparian areas to open water and emergent wetlands. Temporal colonization of beaver wetlands favored large sites low in the watersheds and sites that were impounded later were generally smaller, higher in the watershed, and more likely to be abandoned. These results suggest that beaver have not only increased the number of available breeding sites in the landscape for pond-breeding amphibians, but the resulting mosaic of active and abandoned beaver wetlands also provides suitable breeding habitat for species with differing habitat requirements.

Hunefeldt, Christine: Liberalism in the Bedroom: Quarrelling Spouses in Nineteenth -Century Lima; The Pennsylvania State University Press, University Park, Pennsylvania, 2000. XVII + 388 p.

Fil: Mallo, Josefina. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Hunefeldt, Christine: Liberalism in the Bedroom: Quarrelling Spouses in Nineteenth -Century Lima; The Pennsylvania State University Press, University Park, Pennsylvania, 2000. XVII + 388 p.

Fil: Mallo, Josefina. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Hunefeldt, Christine: Liberalism in the Bedroom: Quarrelling Spouses in Nineteenth -Century Lima; The Pennsylvania State University Press, University Park, Pennsylvania, 2000. XVII + 388 p.

Fil: Mallo, Josefina. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

(Table 3) Pollen analytical and carpological record of the outcrop Hölle below Dwadieden Park, Rügen Island

Pollen analyses and 14C-datings were carried out on two late glacial profiles from Ruegen Island, Mecklenburg-Vorpommern at the southwestern Baltic coast. The palaeoclimatic and palaeoecologic interpretations were supported by carpological investigations. The organogenic deposits of the 'Hoelle' outcrop near Dwasieden Park were chosen because of their unique stratigraphic position, which according to PANZIG (1989), lay under a m3m-Glacial Till of the Mecklenburg Advance (W3). The results indicated that the initial phase of the late glacial sedimentation in a relatively small and asymmetrical lake basin (in comparison with the larger Nieder- and Credner lake to the southwest), probably had its origin in the older Alleroed (II a) after FIRBAS (1949). The basal clastic sediments were rapidly followed by peat deposits and later, due to a rising water table, by muds rich in organic matter. The area was covered with sparse Betula-(Pinus) forests having heliophilous late-glacial elements typical of the surrounding areas during the younger Alleroed (II b). With the climatic change to colder and drier conditions at the beginning of the Younger Dryas (III), the vegetation decreased and enhanced erosional processes led to the fill up of the depression with fine clastic sediments. The intense relief differences of the surroundings coupled with high water saturation in the sediments led to solifluction in the m3m-Glacial Till and its placement discordantly over the organogenic sequence.

A letter to the Right Honourable the Earl of Carnarvon, principal secretary of state for the colonies ; in reply to a Pamphlet entitled Confederation, considered in relation to the Interests of the Empire /

p. [3]-64: A letter to the Right Honourable the Earl of Carnarvon, principal secretary of state for the colonies; p. 65-78: Report of resolutions adopted at a conference of delegates from the provinces of Canada, Nova Scotia and New Brunswick, and the colonies of Newfoundland and Prince Edward Island, held at the city of Quebec, 10th October, 1864, as the basis of a proposed confederation of those provinces and colonies

State of Rhode Island Special Adjudication for Enforcement - volume II: evaluation of driver retraining schools. Analytic study. Final report.

National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Washington, D.C.

State of Rhode Island Special Adjudication for Enforcement - volume III: analysis of the administrative adjudication of traffic offenses. Analytic study. Final report.

National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Washington, D.C.

State of Rhode Island Special Adjudication for Enforcement - technical summary. Final report.

National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Washington, D.C.

Cooperation of prevocational programs for handicapped young adults; rehabilitation-special education. Proceedings of a conference at Highland Park, Illinois. Sponsored by the U.S. Office of Vocational Rehabilitation and Illinois State Normal University, Oct. 30-31 and Nov. 1, 1961.

Mode of access: Internet.

Preliminary evaluation of wind and wave effects at potential LNG terminal sites, State of California : appendix A : an evaluation of the relative wave climate at five onshore LNG sites considering island influences and topographic effects : final report /

"April 1978."

A summary, historical and political, of the first planting, progressive improvements, and present state of the British settlements in North-America : containing I. Some general account of ancient and modern colonies, the granting and settling of the British continent and West-India island colonies ... II. The Hudson's-Bay Company's lodges ... III. Newfoundland harbours and cod-fishery : IV. The province of L'Acadie or Nova Scotia ... V. The several grants ... united by a new charter in the present province of Massachesetts-Bay, commonly called New-England /

Cox,

Manual, with rules and orders, for the use of the General Assembly of the state of Rhode Island.

Vols. for 1867/68- include section with special t.p.: Civil government of Rhode Island.

Laws and ordinances governing the city of Rock Island in the state of Illinois.

Mode of access: Internet.

Public laws of the State of Rhode Island and Providence Plantations. Passed since the session of the General Assembly.

Some volumes published as supplements to Revised statutes.