Lost trees will be replaced by climate-ready alternatives
The UC Davis Arboretum and Public Garden encompasses the entire campus. It is known for its variety of well-cared-for trees, as shown in this photo from 2020. New plantings to replace fallen ones will be chosen based on adaptability to climate change. Kathy Morrison
Four weeks since wicked winds brutally whipped our urban forest, we’re still cleaning up. Work crews are still tackling fallen trees and limbs. The sound of chainsaws drowns out traffic and birdsong.
Many parks and landmarks lost numerous trees. That includes the UC Davis Arboretum and Public Garden.
By its own count, the arboretum – which encompasses the whole UC Davis campus – lost 75 mature trees on New Year’s Eve and during the subsequent storms.
“Considering our campus urban forest tree population is close to 20,000, the losses might have been much worse,” wrote Katie Hetrick, the arboretum’s communications manager, on its website.
It wasn’t just downed trees, but limbs and other debris. The result was quite a mess.
“The cleanup effort undertaken by all of the teams in the Arboretum and Public Garden – Grounds and Landscape Services, Putah Creek Riparian Reserve and the Arboretum – is massive, includes outside contractors, and will take months to recover from,” Hetrick wrote.
Helping to prevent worse losses was the arboretum’s continuous tree stewardship. Because they’re part of an arboretum, all trees (as well as shrubs, perennials and other plants) are carefully tracked and monitored from the day they’re planted. Problems are tackled before they have a chance to create havoc.
Because of that constant care, the arboretum’s trees are especially healthy. That’s what makes this recent devastation particularly shocking. One possible reason: A shift in wind direction. Local trees have decades of resistance to southern winds; these gusts hit from the east.
The recovery will include replanting, but not necessarily the same trees.
“While the weather-related havoc wrought across campus is disheartening, it is also important to understand that our campus is not just reacting, we planned for this uncertain future and are already taking action,” Hetrick said.
New trees will not only add beauty and shade, but more climate resiliency. UC Davis’ Campus Tree Renewal Program plans to create a legacy of trees that will last 100 years or more.
As part of this effort, students trialed about 45 tree species in test sites on campus. The top performers earned permanent spots for their species in UC Davis’ future.
That group includes a lot of familiar oaks – valley oaks, live oaks and cork oaks – plus drought-resistant Texas red oak. The success of the Texas red oak prompted students to test more Texas natives.
As crews continue the clean-up, the arboretum is now raising funds to support its tree-planting efforts. (See the links on the arboretum website.)
Hetrick noted, “We are devastated by the loss, but our current efforts to transition our landscapes to be climate-ready offer hope.”
For more: https://arboretum.ucdavis.edu.
Comments
0 comments have been posted.Sacramento Digs Gardening to your inbox.
Thanks to Our Sponsor!
Local News
Sites We Like
Garden Checklist for week of Nov. 3
November still offers good weather for fall planting:
* If you haven't already, it's time to clean up the remains of summer. Pull faded annuals and vegetables. Prune dead or broken branches from trees.
* Now is the best time to plant most trees and shrubs. This gives them plenty of time for root development before spring growth. They also benefit from fall and winter rains.
* Set out cool-weather annuals such as pansies and snapdragons.
* Lettuce, cabbage and broccoli also can be planted now.
* Plant garlic and onions.
* Keep planting bulbs to spread out your spring bloom. Some possible suggestions: daffodils, crocuses, hyacinths, tulips, anemones and scillas.
* This is also a good time to seed wildflowers and plant such spring bloomers as sweet pea, sweet alyssum and bachelor buttons.
* Rake and compost leaves, but dispose of any diseased plant material. For example, if peach and nectarine trees showed signs of leaf curl this year, clean up under trees and dispose of those leaves instead of composting.
* Save dry stalks and seedpods from poppies and coneflowers for fall bouquets and holiday decorating.
* For holiday blooms indoors, plant paperwhite narcissus bulbs now. Fill a shallow bowl or dish with 2 inches of rocks or pebbles. Place bulbs in the dish with the root end nestled in the rocks. Add water until it just touches the bottom of the bulbs. Place the dish in a sunny window. Add water as needed.
* Give your azaleas, gardenias and camellias a boost with chelated iron.
* For larger blooms, pinch off some camellia buds.
* Prune non-flowering trees and shrubs while dormant.
* To help prevent leaf curl, apply a copper fungicide spray to peach and nectarine trees after they lose their leaves this month. Leaf curl, which shows up in the spring, is caused by a fungus that winters as spores on the limbs and around the tree in fallen leaves. Sprays are most effective now.
Powered by California Local
