"Elaeagnus Block" - A massive invasion of streamside [EDITED & UPDATED AUG 19]
This invasion survived the several-week-long operation of cut-and-paste chemical control of Elaeagnus along the streambank and throughout its regen margin, by a group of contractors for North Shore City Council in 1997. A lot of dead Elaeagnus resulted, and some regrowth was followed up by the fulltime volunteer restoration project. This particular occurrence was large and totally live, on a kikuyu-covered bank without trees. It was not addressed by volunteers, who focused on releasing native vegetation on the opposite bank.
In 2019 the invasion has increased, along with the blackberry that was present in 1997, and Japanese honeysuckle is now part of the mess.
On the far (KaipatikiRoadside) bank, viewed ti kouka trunks from the Witheford Streamside, the large pale mass of Elaeagnus,blackberry and honeysuckle is at left of the Tradescantia here:
https://inaturalist.nz/observations/29945887
[UPDATE AUG 2019 : Surrounded as it is by dense Tradescantia, from recent experience with honeysuckle and shrub weeds elsewhere we expect that it could be most economically controlled over a period of a few years, by successively cutting the outer branches, tossing them towrds the centre, and throwing Tradescantia over the outermost foliage.
A fun and tempting Project which we are refraining from volunteering for due to a lack of time, but we have applied this treatment to a small part of the invasion where blackberry and Elaeagnus were becoming entangled in the downstream-side of Mama ti kouka, the 100-head matriarch with her feet at water's edge and still providing the canopy just upstream of Elaeagnus Block.]
Just above the stream on the Kaipatiki Road side, viewed from near the top of the bank"
https://inaturalist.nz/observations/24659985
In 1999
Upstream of Elaeagnus Block the stream emerged from "Mamaku Run" at the downstream margin of wild native canopy
https://inaturalist.nz/observations/24650826
while downstream of Eleagnus Block, the stream was sun-exposed:
https://inaturalist.nz/observations/24649672
https://inaturalist.nz/observations/24650828
with native regeneration on the Witheford side stream edge after the cutting up, piling and ongoing decay of dead cut-and-pasted Elaeagnus as well as regrowth or untreated stems, and the hand-removal, piling and composting of tradescantia and Montbretia
https://inaturalist.nz/observations/24649671
https://inaturalist.nz/observations/24650827
https://inaturalist.nz/observations/24650825
https://inaturalist.nz/observations/24650829
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