Alien Plant Invasions in Native Ecosystems of Hawai'i: Management and Research
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Alien Plant Invasions in Native Ecosystems of Hawai'i: Management and Research Edited by Charles P. Stone, Clifford W. Smith, and J. Timothy Tunison University of Hawaii Cooperative National Park Resources Studies Unit 3190 Made Way ' Honolulu, Hawai'i O 1992 Cooperative National Park Resources Studies Unit University of Hawaii, Manoa All Rights Reserved Support for publication was provided by the National Park Service and Hawaii Natural History Association Cover illustration by Dietrich Varez; used with permission Camera-ready copy was prepared by the editors Manufacture of this book was through the production services of University of Hawaii Press The paper used in this publication meets the minimum requirements of American National Standard for Information Sciences/-permanence of Paper for Printed Library Materials Library of Congress Cataloging-in-Publication Data Alien plant invasions in native ecosystems of Hawai'i : management and research / edited by Charles P. Stone, Clifford W. Smith, and J. Timothy Tunison. P. cm. Papers from a symposium organized by the National Park Service and the Cooperative National Resources Unit at the University of Hawaii, which was held in conjunction with the Sixth Conference in Natural Sciences at Hawaii Volcanoes National Park in 1986. Includes bibliographical references and index. ISBN 0-8248-1474-6 1. Alien plants--Hawaii--Congresses. 2. Alien plants--Control- -Hawaii--Congresses. 3. Plant invasions--Hawaii--Congresses. 4. Alien plants--Hawaii--Ecology--Congresses. 5. Plant introduction--Hawaii--Congresses. I. Stone, Charles P. 11. Smith, Clifford W., 1938- . 111. Tunison, J. Timothy, 1948- . IV. Cooperative National Park Resources Studies Unit, Hawaii. SB612H3A56 1993 639.9'9'09969--dc20 92-25041 CIP Distributed by University of Hawaii Press Honolulu, Hawaii %822 CONTENTS Preface Acknowledgments Explanatory Notes Authors PERSPECTIVES An Overview of Problems with Introduced Plant Speeies in National Parks and Biosphere Reserves of the United States Lloyd L. Loope Effects of Alien Plants on Native Ecosystems Peter M. Vitousek Characteiistics of Invading Plant Species Richard N. Mack Alien Plant Management in Everglades National Park: An Historical Perspective Anne Marie LaRosa, Robert F. Doren, and Lance Gunderson Alien Plants at Channel Islands National Park William L. Halvorson STATUS AND DISTRIBUTION OF SOME IMPORTANT ALIEN PLANTS IN HAWAIcI Origin and Distribution of Adventive Alien Flowering Plants in Hawai'i Lyndon Wester Distribution of Six Alien Plant Species in Upland Habitats on the Island of Hawai'i James D. Jacobi and Fredrick R Warshauer Alien Plants on the Northwestern Hawaiian Islands Derral R Herbst and WmenL. Wagner Firetree (Myricafaya) Distribution in Hawai'i Louis D. Whiteaker and Donald E. Gardner Distribution, Status, Phenology, Rate of Spread, and Management of Clidemia in Hawai'i Clifford W: Smith Contents Mullein (Verbascum thapsus): the Spread and Adaptation of a Temperate Weed in the Montane Tropics James 0. Juvik and Sonia P. Juvik The Status of Banana Poka in Hawai'i Anne Marie LaRosa Distribution and Spread of Alien Plants in Kipahulu Valley, Haleakala National Park, above 2,300 ft Elevation Stephen J. Anderson, Charles P. Stone, and Paul K Higashino PHYSICAL AND CHEMICAL CONTROL Herbicidal Control of Selected Alien Plant Species in Hawaii Volcanoes National Park Gregory L. Santos, Dina Kageler, Donald E. Gardner, Linda W; Cuddihy, and Charles P. Stone Fountain Grass Control in Hawaii Volcanoes National Park: Management Considerations and Strategies J. Timothy Tunison Fire and Alien Plants in Hawai'i: Research and ManagementImplications for Native Ecosystems Clifford W. Smith and J. Timothy Tunison BIOLOGICAL CONTROL Biological Control of Lantana, Prickly Pear, and Hamlkua Pamakani in Hawai'i: a Review and Update Clifon J. Davis, Ernest Yoshioku, and Dina Kageler Plant Pathogens as Biocontrol Agents in Native Hawaiian Ecosystems Donald E. Gardner Review and Status of Biological Control of Clidemia in Hawai'i Larry M. Nakahara, Robert M. Burkhart, and George Y: Funasaki Status of Biological Control of Weeds in Hawai'i and Implications for Managing Native Ecosystems George P. Markin, Po-Yung Lai, and George Y: Funasaki AGENCY ORGANIZATION AND IA~~DOWNERAPPR~ACHES Alien Plant Control Strategies in Hawaii Volcanoes National Park J. Timothy Tunison Contents vii Success in Controlling Localized men Plants in Hawaii Volcanoes National Park J. Timothy Tunison and Nicholas G. Zimmer Control of Alien Plants on Nature Conservancy Preserves R. Alan Holt Alien Plant Control on State Lands Including Natural Areas 536 Victor M. Tanimoto and Winona P. Char Alien Plants in Haleakala National Park Lloyd L. Loope, Ronald J. Nagata, and Arthur C. Medeiros The U.S. Department of Agriculture's Rural Development Approach 577 to Alien Plant Control in Hawai'i: a Case Study Mike Tulang Introduced Plant Control on Private Lands in Hawai'i Carl "Soot" Bredhoff Public/Private Sector Partnerships to Preserve Native Ecosystems: 589 The Department of Hawaiian Home Lands Experience Hardy Spoehr INTRODUCED PLANTS IN THE ABSENCE OF UNGULATES Relationships among Native and Alien Plants on Pacific Islands 597 with and without Significant Human Disturbance and Feral Ungulates Mark D. Merlin and James 0. Juvik Alien and Native Plant Response to Release from Feral Sheep Browsing on Mauna Kea Paul G. Scowcroft and C. Eugene Conrad Responses of Hawaiian Ecosystems to Removal of Feral Pigs and Goats Charles P. Stone, Linda WI Cuddihy, and J. Timothy Tunison CHOOSING WHICH PLANTS TO INTRODUCE Plant Importation Rules and Regulations Stan Higa Activities and Needs of the Horticulture Industry in Relation to Alien Plant Problems in Hawai'i Rylan S.N. Yee and Wayne C. Gagne' Plant Introduction Needs of the Hawaiian Sugar Industry Robert K Osgood and Robert D.Wemer Contents Choosing Plant Introductions: Needs of Graziers Gordon Cran and Ken Dillingham CHOOSING WHICH PLANTS TO CONTROL IN NATIVE ECOSYSTEMS Modelling to Predict the Fate of Invading Plants Richard N. Mack and Michael E. Moody Rule-Based Decision Making: a Way to Determine which Alien Species to Control Kent W: Bridges Controlling Weeds in Natural Areas in HawaiLi: a Manager's Perspective Dan Taylor Evaluating Proposed Biological Control Programs for Introduced Plants George P. Markin and Ernest Yoshioka ECOSYSTEM APPROACHES EDUCATION, AND COMMUNITYINVOLV~MENT Special Ecological Areas: An Approach to Alien Plant Control in Hawaii Volcanoes National Park -' J. Timothy Tunison and Charles P. Stone Environmental Education in HawaiLi: History and Overview Charles P. Stone Environmental Education in the Schools John W Hawkim The Use of Volunteers for Alien Plant Control at Hawaii Volcanoes National Park and The Nature Conservancy's Kamakou Preserve J. Timothy Tunison and Edwin T. Misaki IN CONCLUSION.. ALIEN PLANT MANAGEMENT IN HAWAI'I: CONCLUSIONS J. Timothy Tunison, Clifford W Smith, and Charles P. Stone INDEX PREFACE The problem of introduced or alien plants in Hawai'i's natural areas is as critical now as it ever has been. As the "crossroads of the Pacific," Hawai'i is subject to greater commerce and visitation with time. Alien plants are increasingly well distributed in other parts of the world for potential transport to Hawai'i. Growin numbers of residents in the State -- man from different parts of the worf d -- means more international and interisr and travel, which also favors alien plant introduction and dispersal. Fragmentation of Hawai'i's few remaining natural areas provides more boundanes and corridors for alien plants to made, and degradation of natural areas (for example, disturbance of soil by hoofed mammals and development for industry or housing) provides more sites for introduced plant establishment. Some alien plants can modify areas to favor their own survival and to discourage that of native plants through shading, chemical changes in soils and nutrient cycles, and changing fire regimes. Indeed, the vegetation of many large areas of Hawai'i is now almost entirely comprised of introduced plant species, and significant invasions of natural areas continue. Most of the 44 papers in this volume began as presentations at a 1986 symposium entitled "Control of Introduced Plants in Hawai'i's Native Ecosystems." The Symposium, organized by the National Park Service and the Cooperative National Park Resources Studies Unit at the University of Hawaii, was held in conjunction with the Sixth Conference in Natural Sciences at Hawaii Volcanoes National Park in 1986. In the past few years, most of the papers have been u dated considerably, and a few contributions, including a concluding chapter, Eave been added. One milestone publication in 1990, the Manual of the Flowering Plants of Hawai'i, caused the changing of plant taxonomy in the papers to conform with current usage. For some papers, this was a .major task. Other important statewide and local progress in the past few years also necessitated significant , revisions. The purpose of the Symposium was to summarize and communicate research results, management implications, needs, and perspectives of special interest groups on the topic of introduced or alien plants in Hawai'i. Efforts at control of introduced plants in native Hawaiian ecosystems was the em hasis of the meeting and remains the primary focus of this book. We hope t 1at those responsible for and those simply interested in alien plant problems will find something useful herein, whether in the Hawaiian Archipelago, other islands of the world, or in natural areas on the continents. ACKNOWLEDGMENTS Each manuscript in this volume received peer review by at least two individuals in addition to the three editors and the chairperson of one of the 10 sessions at which apers were presented. Session chairs (other than the editors) were R. HoE dy, D. Taylor, J.W. Beardsley, C.E. Conrad, J.D. Jacobi, L.L. Loope, and F.M. Pottenger. We thank these individuals and the anonymous reviewers of the manuscripts for their comments. The one person most responsible for publication of this volume is D.B. Stone, Administrative Assistant for Research at Hawaii Volcanoes National Park.