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Frequency-Dependent Seed Dispersal By Ants Of Two Deciduous Forest Herbs, Brent H. Smith, Catherine E. De Rivera, Cara Lin Bridgman, John J. Woid

Environmental Science and Management Faculty Publications and Presentations

Two co—occurring deciduous forest myrmecochores, Asarum canadense and Jeffersonia diphylla, release their seeds at approximately the same time, and therefore potentially compete for ants as dispersers. Within a single woodlot, we placed seeds of both species inside a dense Jeffersonia population away from Asarum plants, inside a dense Asarum population away from Jeffersonia plants, and in a site where plants of neither species occurred. No preference was exhibited by ants where natural populations were absent. Preference at the other two sites was frequency dependent: ants preferred seeds of the introduced species. Species preferred by ants have higher seed and …

Species Richness Gradients Of Oak Forest Plants Along The Missouri River In Nebraska And Iowa, Steven B. Rolfsmeier

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The upland deciduous forests of the Missouri River valley contain many plants typical of forests to the east of this area, which are assumed to have migrated northward and westward along the river in postglacial times. Previous workers have reported a gradient of decreasing species richness upstream among woody species, which is suggested to be the result of climatic gradients and differential dispersal capabilities of the immigrant species. Floristic work on all vascular species in eight woodland sites along the Nebraska-Iowa border quantifies the presence of similar gradients for herbaceous species, but of differing degrees. These studies also reveal the …

Reproductive Biology Of Pinus Sylvestris L.: Seed Yield, Flower Phenology, The Response Of Young Seedlings To Ga 4/7, And Developmental Anatomy, Teresa K. Boes

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Introduction And Enhancement Of Vegetative Cover At Lake Mead, Jennifer S. Haley, Lisa K. Croft, Suzanne E. Leavitt, Larry J. Paulson

Publications (WR)

Studies done by the Nevada Department of Wildlife (NDOW) and the Arizona Fish and Game between 1978 and 1981 indicate that inadequate cover may be limiting the production and survival of largemouth bass at the Lake Mead National Recreation Area (LMNRA). As a result of these studies, NDOW initiated a contract in 1986 with the Lake Mead Research Center (LMRC) to investigate means of improving habitat for game fish by introducing natural and/or artificial cover. During Phase I (1986-1987) of this contract, the shoreline of Lake Mead was surveyed for aquatic and terrestrial plant growth. Also during this time, submerged …

Health Effects Of Air Pollutants (Sulfur Dioxide, Ozone, And Carbon Monoxide), Robert A. Bethel

Air Quality Protection in the West (November 27-28)

19 pages (includes illustrations).

Contains references.

Urban Ambient Air Quality Trends, N. O. Gerald

Air Quality Protection in the West (November 27-28)

24 pages (includes illustrations and maps).

To The U.S. Department Of Transportation: Comments Of The Environmental Defense Fund On The Secretary Of Transportation’S National Transportation Policy, Robert E. Yuhnke

Air Quality Protection in the West (November 27-28)

20 pages.

Urban Air Quality Litigation Under The Clean Air Act: Past, Present And Future, David S. Baron

Air Quality Protection in the West (November 27-28)

20 pages.

Contains footnotes.

Motor Vehicle Air Pollution Control: The Remaining Issues, Michael P. Walsh

Air Quality Protection in the West (November 27-28)

26 pages (includes illustrations).

Contains references.

Diminishing Views: Air Quality In Western National Parks, Christine L. Shaver

Air Quality Protection in the West (November 27-28)

17 pages.

Contains references.

Transboundary Air Pollution: The Legal Framework, Mark S. Squillace

Air Quality Protection in the West (November 27-28)

12 pages (includes illustrations).

Contains footnotes.

Strategies To Overcome Agency Recalcitrance Under The Federal Clean Air Act: The Acid Rain Litigation Experience, David R. Wooley

Air Quality Protection in the West (November 27-28)

12 pages.

Agenda: Air Quality Protection In The West, University Of Colorado Boulder. Natural Resources Law Center

Air Quality Protection in the West (November 27-28)

Conference organizers, session moderators and/or speakers included University of Colorado School of Law professor Mark S. Squillace.

Visibility, acid rain, air toxics, and urban air pollution are the topics of an upcoming Center conference on air quality in the West. The conference will be held at the School of Law in Boulder on November 27-28, 1989. Presentations will describe the nature and scope of the issues, the existing legal framework and experience with its implementation, and proposed changes in the law. Emphasis will be placed on air quality issues in the West and efforts underway to address these problems. Special …

Toxic Air Pollution: New Solutions To Old Problems, Devra Lee Davis, Curtis Moore

Air Quality Protection in the West (November 27-28)

12 pages.

Regional Air Quality Concerns In The West: Acid Deposition And Ozone, Kathy A. Tonnessen

Air Quality Protection in the West (November 27-28)

22 pages.

Contains 3 pages of references.

City Of Tampa Surface Water Monitoring Plan Of Hillsborough Bay, City Of Tampa Department Of Sanitary Sewers

Reports

This plan of study will outline all aspects of our proposed monitoring program to satisfy requirements set forth in specific condition #6 of construction permit DC29-152799 issued by the Florida Department of Environmental Regulation.

The Probe, Issue 97 - November 1989

The Probe: Newsletter of the National Animal Damage Control Association

THE PROBE National Animal Damage Control Association
NOVEMBER 1989
APHIS Activity Report
Letters to Ye Ed
Animal Rights
The Humane Society
Personnel
Freeze Dirt
Coyotes are Dangerous

Water Conservation Through Irrigation Technology, Donald H. Negri, John J. Hanchar, United States Department Of Agriculture, Economic Research Service

All U.S. Government Documents (Utah Regional Depository)

Improved irrigation technology and advanced farm management practices offer an opportunity for agriculture to use water more efficiently. Farmers may install new equipment, such as drip irrigation systems, or adopt advanced water management practices to conserve water without sacrificing crop yields. While farmers' decision to adopt water-saving irrigation technology responds to the cost of water, physical properties of the land such as topography or soil properties of the land such as topography or soil texture dominate the choice of irrigation technology.

What On Earth Are We Doing?, St Mary's University

President's Peace Commission - Programs

The President’s Peace Commission existed from 1984 to 2013 at St. Mary's University. The Commission fostered an ethical commitment to participate in the establishment of world peace and social justice.

This program is about environmental destruction and world politics.

Lapita Fishing Strategies: A Review Of The Archaeological And Linguistic Evidence, Richard Walter

Pacific Studies

No abstract provided.

Water Resources Review - November 1989, Annis Water Resources Institute

AWRI Reviews

No abstract provided.

Herring Gulls, Larus Argentatus, Nesting On Sandusky Bay, Lake Erie, 1989, Richard A. Dolbeer, P.P. Woronecki, T. W. Seamans, B. N. Buckingham, E. C. Cleary

United States Department of Agriculture Wildlife Services: Staff Publications

One of the largest herring gull (Larus argentatus} nesting populations on the Great Lakes is located in an urban setting on Sandusky Bay in the Ohio portion of Lake Erie. The survey reported here, carried out in 1989, indicated a population of 4,250 nests. The population has expanded from a focal point on Turning Point Island to coal piles at the Lower Lake Dock Company, rooftops in downtown Sandusky and breakwalls near Cedar Point. Comparison with data from a survey performed in 1976 indicates the population has grown at an average annual rate of 11.9% during the past 13 years. …

Reconsidering Water Quality Protection In The United States, Lawrence J. Macdonnell

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

4 pages.

United States Hazardous Waste Law And Policy, A. Dan Tarlock

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

3 pages.

The National Environmental Policy Act: No Longer A Teenager, But Not Yet Grown-Up, George W. (Rock) Pring

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

98 pages.

Contains footnotes.

Existing Legal Treatment Of Developing Countries: Differential, Contextual, And Absolute Norms, Daniel Barstow Magraw

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

53 pages.

Contains 11 pages of endnotes.

Agenda: New Challenges For Environmental Protection: Second Sino-American Conference On Environmental Law, University Of Colorado Boulder. Natural Resources Law Center

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

Workshop held Sept. 18-19, 1989; conference held Oct. 12-13, 1989, in Boulder, Colorado.

Conference speakers included University of Colorado School of Law professors Daniel Barstow Magraw and Lawrence J. MacDonnell.

Contents of papers from workshop and conference:

To protect developing city by the enactment of local laws and regulations / Wu Zilin -- Legislative control of air pollution & water pollution of the P.R.China / Xiao Longan -- The law of natural conservation in China / Ma Xiang-cong -- 'Weighing environmental risks : EPA's unfinished business', Environment, vol. 30, no. 6, July/August 1988, p. 14-17, 34-39 / Richard Morgenstern, Stuart …

The United States Experience With Air Pollution Control, A. Dan Tarlock

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

4 pages.

To Protect Developing City By The Enactment Of Local Laws And Regulations, Zilin Wu

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

13 pages.

Legislative Control Of Air Pollution & Water Pollution Of The P.R. China, Longan Xiao

New Challenges for Environmental Protection: Second Sino-American Conference on Environmental Law (October 12-13)

10 pages.