ALIEN ALGAE REMOVAL — Celebrate the four-year anniversary of volunteer cleanups in Waikiki by joining the alien algae project at Natatorium, behind Waikiki Aquarium, 8 a.m.-noon Saturday. Snacks and lunch provided; bring snorkel gear if you want to get in the water. Contact Signe Opheim at opheim@hawaii.edu or 779-2616.

MAKIKI WAI HELPERS — The state Department of Land and Natural Resources and the Hawai'i Nature Center are looking for help 9 a.m.-2 p.m. Saturday to make trail improvements, remove weeds and plant native plants along the Makiki trail, as part of the Makiki Wai (Watershed Awareness Initiative). Bring long pants, long-sleeved shirt, shoes or boots, gloves, insect repellent, water and lunch. Meet at the Makiki Forestry Baseyard. For directions and information, call 973-9782 or check www.hawaiitrails.org/trail.asp?TrailID=OA+19+004&island=Oahu.

ROAD TO HANA CLEANUP — The second phase of the Road to Hana Cleanup, from Kaupakalua Road to Kaumahina State Wayside Park, will be on Saturday, with volunteers picking up trash, trimming brush and doing other work. Contact Community Work Day Program at (808) 877-2524 or cwdkhb@pixi.com.

KAWAI NUI PROJECTS — 'Ahahui Malama i ka Lokahi and Kailua Hawaiian Civic Club conduct regular service projects to restore ethnobotanical and cultural features at Kawai Nui Marsh state park. Next project dates are 8:30 a.m.-12:30 p.m. Oct. 14 and 21. Bring lunch, water, rain gear, bug repellent, gloves, tools. Call Chuck "Doc" Burrows at 595-3922 or Rick "Kaimi" Scudder at 589-2963.

WEED & POT CLUB — Maui Nui Botanical Garden's Weed & Pot Club meets 8:30-10:30 a.m. Wednesdays at 150 Kanaloa Ave. in Kahului to work on nursery plants and perform other tasks. Tools, gloves and drinking water provided; bring sunscreen, wear shoes.

KANAHA POND — Join Native Hawaiian Plant Society volunteers at Kanaha Pond Wildlife Sanctuary 7:30-11 a.m. Thursdays for weeding and brush cutting; work also done at Maui Ocean Land Trust wetlands. (808) 572-6338.

MAUI TRAIL CREWS — Na Ala Hele volunteers meet Saturdays, Sundays and Tuesdays to build and clean Maui trails. Leave from Kahului Baseyard at 7:30 a.m.; bring lunch, water and sturdy shoes; tools and transportation provided. (808) 873-3509 or mark.a.peyton@hawaii.gov.

SHOW TURTLES ALOHA — Monitor and protect Hawaiian green sea turtles on O'ahu's North Shore as a volunteer with the Show Turtles Aloha program. Spend a few hours a week educating beachgoers and caring for honu; on-site training provided. www.turtles.org/laniakea.

WAIMEA VALLEY DOCENTS — The Waimea Valley Audubon Center is training volunteers to work as teaching docents alongside field educators in school programs. Must commit to 8:30 a.m.-noon one day a week, through December. 638-9199, ext. 210.

Send listings to: For the Environment, P.O. Box 156, Wailuku, HI 96793; cwilson@honoluluadver tiser.com; or fax (808) 242-1520.