![]() ![]() 2012 ) ThreatsĮphemeral wetlands are under threat of invasion by numerous exotic weeds, particularly nitrogen-fixers such as gorse ( Ulex europaeus), conifers especially pines ( Pinus spp. Threat statusĬritically endangered ( Holdaway et al. We have no information on threatened invertebrates. brown mudfish ( Neochanna apoda ), Canterbury mudfish ( Neochanna borrowsius ), black mudfish ( Neochanna diversus ), and Northland mudfish ( Neochanna heleios ), which is known from only three ephemeral wetland sites on the Kerikeri volcanic plateau and is abundant only at the type locality. Threatened and rare fauna include several species of mudfish, i.e. Indeterminate species include the nationally critical Limosella (b) (CHR 515038 Manutahi), Craspedia (j) (CHR 516302 Lake Heron), Cardamine (b) (CHR 312947 ‘tarn’), and Craspedia (e) (CHR 514391 ‘tarn’), and the naturally uncommon Myosotis aff. Data-deficient species include creeping cudweed ( Euchiton ensifer ), Polygonum plebeium, and swamp buttercup ( Ranunculus macropus ). īrachyscome linearis, iti ( Cardamine lacustris ), Carex capillacea, Edgar’s sedge ( Carex edgariae ), Carex traversii, Centrolepis minima, Crassula mataikona, Crassula ruamahanga, Lepilaena bilocularis, sand musk ( Mazus arenarius ), Ranunculus maculatus, Ranunculus ranceorum , and Ranunculus ternatifolius are naturally uncommon.Ĭolonisers include Gratiola pedunculata. novaezeelandiae ), Ranunculus brevis, Selliera rotundifolia, and Tetrachondra hamiltonii. Declining species include the slender niggerhead ( Carex tenuiculmis ), tufted hair grass ( Deschampsia cespitosa ), sand spike sedge ( Eleocharis neozelandica ), dwarf woodrush ( Luzula celata ), dwarf musk ( Mazus novaezeelandiae subsp. impolitus ), and Lady’s tresses ( Spiranthes novae-zelandiae ). fluitans, New Zealand iris ( Libertia peregrinans ), dwarf musk ( Mazus novaezeelandiae subsp. ![]() Nationally vulnerable species include the curly sedge ( Carex cirrhosa ), pygmy sundew ( Drosera pygmaea ), Gratiola concinna, hydatella ( Hydatella inconspicua ), Iphigenia novae-zelandiae, Isolepis fluitans var. delicatula ), creeping foxglove ( Ourisia modesta ), Pimelea actea, kettlehole cudweed ( Pseudognaphalium ephemerum ), Sebaea ovata and marsh arrow grass ( Triglochin palustris ) the nationally endangered water brome ( Amphibromus fluitans ), sedge ( Carex uncifolia ), Coprosma talbrockiei, Gunnera densiflora, pygmy clubrush ( Isolepis basilaris ), Lobelia carens, Matthew’s forget-me-not ( Myosotis matthewsii ), and bastard grass ( Uncinia strictissima ). ![]() novae-zelandiae ), stalked adder’s tongue fern ( Ophioglossum petiolatum ), mountain myrrh ( Oreomyrrhis colensoi var. minima ), Crassula multicaulis, Crassula peduncularis, Deyeuxia lacustris, Lobelia fugax, New Zealand mousetail ( Myosurus minimus subsp. Threatened and rare plants include the extinct Logania depressa the nationally critical Acaena rorida, sneezeweed ( Centipeda minima subsp. The subsets of ephemeral wetlands that occur on lake margins, dune deflation hollows, dune slacks and damp sand plains are described separately. minima ), Tarawera ( Epilobium pallidiflorum ), Glossostigma elatinoides, common water milfoil ( Myriophyllum propinquum ), Waoriki ( Ranunculus amphitrichus ), Sinclair’s sedge ( Carex sinclairii ), sharp spike sedge ( Eleocharis acuta ), Isolepis prolifer, I. Characteristic species include sneezeweed ( Centipeda minima subsp. Substrates are usually mineral and they occur on a range of landforms including fluvial systems, bedrock, dunes, and volcanic deposits. The water source is groundwater or an adjacent water body (Johnson & Rogers 2003). An ephemeral wetland in Burgoo Stream, western Nelson (Peter Williams)Įphemeral wetlands are formed in closed depressions lacking a surface outlet and are wet only seasonally or in wet years. ![]()
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