Wetlands: Biodiversity Offsets: Challenges and considerations

67 %
33 %
Information about Wetlands: Biodiversity Offsets: Challenges and considerations
Education

Published on February 19, 2014

Author: IEUO

Source: slideshare.net

Description

Written by Dave Howerter, Director of Conservation Science, Ducks Unlimited Canada

Wetlands: Biodiversity Offsets: Challenges and considerations Wetlands: David Howerter & Karla Guyn, Ducks Unlimited Canada ecology of prairie wetlands and their importance to waterfowl

Outline Wetland definition Wetland Classification Wetland Values Offset Challenges DUC Experiences  Atlantic Canada  Alberta

What is a wetland?  “ …. land that is saturated with water long enough to promote wetland or aquatic processes as indicated by poorly drained soils, hydrophytic vegetation, and various kinds of biological activity which are adapted to the wet environment.” (Wetlands of Canada, 1988, page 416)

Canada’s Wetlands • there are five classes of wetlands in the Canadian Wetland Classification System: bogs, fens, swamps, marshes, & shallow water wetlands

Canada’s Wetlands • organic wetlands (> 40 cm of peat): - bogs - fens peatlands

Bogs

Bogs  peat-covered wetland  wetland isolated from ground water  low nutrients  water and peat usually acidic  dominated by Sphagnum mosses with tree, shrub or treeless vegetation cover

Fens

Fens  peat-covered wetland  wetland exposed to groundwater  more nutrients than bogs  less acidic  greater variety of plants than bogs: grass meadows, shrubs, and trees

Canada’s Wetlands • organic wetlands (> 40 cm of peat): - bogs - fens peatlands • mineral wetlands: - swamps - marshes - shallow open water

Swamps

Swamps  non-peat forming wetland  waterlogged soil, often with standing water  vegetation is dense coniferous or deciduous trees, or tall shrub thickets  water-loving plants

Marshes

Marshes  non-peat forming wetland  waterlogged soil in plant rooting zone, often with standing water  nutrient rich water offering greater plant diversity: emergent reeds, rushes or sedges  surface water level may fluctuate seasonally

Shallow open waters

Shallow open waters  non-peat forming wetlands  locally known as ponds or sloughs  standing water, often a transition between lake and marsh  fewer emergent plants but submersed plants may be present  water depth usually < 2 meters

 Canada has approx. 127 million ha of wetlands (24% of all the world’s wetlands)

Prairie Pothole Region Manitoba Montana North Dakota Minnesota South Dakota approximately 715,000 km2 Iowa

Stewart and Kantrud (1971)  based on vegetative growth  allows for a more detailed classification Stewart, R. E. and H. A. Kantrud. 1971. Classification of Natural Ponds and Lakes in the Glaciated Prairie Region. Resource Publication 92, Bureau of Sport Fisheries and Wildlife, U.S. Fish and Wildlife

Permanent Ponds (Class V)

Semi-permanent Ponds (Class IV)

Seasonal Ponds (Class III)

Temporary Ponds (Class II)

Ephemeral Ponds (Class 1)

Relationship Between # Mallard Pairs/Ha of Wetland and Individual Wetland Size (in Ha) 1 0.9 Mallard Pairs/Ha 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 1 2 3 4 5 6 Wetland Size (in Ha) Wetland Area = 10 Ha Wetland Area = 10 Ha Wetland Area = 10 Ha One 10 Ha wetland = 1 Mallard Pair Ten 1 Ha wetlands = 3 Mallard Pairs One Hundred 0.1 Ha wetlands = 9 Mallard Pairs Source: Reynolds, R.E., D.R. Cohan, and M.A. Johnson. 1996. Using landscape information approaches to increase duck recruitment in the Prairie Pothole Region. Trans. N. Amer. Wildl. And Nat. Resour. Conf.

Wetland Offset Challenges 1. Equivalency – Variability – Clear Objectives, Agreement on Currency

Wetland Values Water Quality  Nutrients  Chemicals  Sediments Water quantity  Flood prevention  Groundwater recharge GHG sequestration Recreation Biodiversity

Hydrologic Response To Draining Wetlands current drainage area boundary wetlands stream

Hydrologic Response To Draining Wetlands

Hydrologic Response To Draining Wetlands New drainage area boundary

Wetland Offset Challenges 1. Equivalency – Variability – Clear Objectives, Agreement on currency 2. Proximity – Benefits accrue at different scales

Wetland Restoration vs. Securement A) Fall 2008 B) Spring 2009 C) Fall 2011

Wetland Offset Challenges 1. Equivalency – Variability – Clear Objectives, Agreement on currency 2. Proximity – Benefits accrue at different scales 3. Timing – Benefits accrue at different rates 4. Additionality – Expected rates of loss

Offset rules cabaysdirt works.com

Wetland Offset Challenges 1. Equivalency – Variability – Clear Objectives, Agreement on currency 2. Proximity – Benefits accrue at different scales 3. Timing – Benefits accrue at different rates 4. Additionality – Expected rates of loss 5. Equitability

Wetland Offset Challenges 1. Equivalency – Variability – Clear Objectives, Agreement on currency 2. Proximity – Benefits accrue at different scales 3. Timing – Benefits accrue at different rates 4. Additionality – Expected rates of loss 5. Equitability 6. Lack of wetland inventory/monitoring

Atlantic Province Offset Similarities NB, NS and PEI:  Wetland and Watercourse Alteration Regulation  Mitigation Sequence in place  Ratios established  NB 2:1, NS 2:1, PE 3:1

Alberta Offset rules  Mitigation Sequence in place  Variable Ratios  Within same watershed

Wetland Offset Challenges 1. Equivalency – Variability – Clear Objectives, Agreement on currency 2. Proximity – Benefits accrue at different scales 3. Timing – Benefits accrue at different rates 4. Additionality – Expected rates of loss 5. Equitability 6. Lack of wetland inventory/monitoring 7. Finding a qualified delivery agent!

Delivery Agent      Identify suitable projects Manage and maintain projects as required Provide long-term security Monitor projects Provide effective and efficient process

Ducks Unlimited Canada, a private, non-profit charitable organization, conserves, restores and manages wetlands and associated habitat for North America’s waterfowl. These habitats also benefit other wildlife and people.

Add a comment

Related presentations

Related pages

Wetlands | LinkedIn

... Wetlands and Biodiversity at OPUS Stewart Weir. Edmonton, ... Using Carbon Offsets to Restore ... Biodiversity Offsets: Challenges and considerations.
Read more

Biodiversity and Conservation Offsets: A Guide for Albertans

Biodiversity and Conservation Offsets: ... Biodiversity and Conservation Offsets. 2.0 The Challenge of Biodiversity ... new wetland offset system is ...
Read more

Offsets | LinkedIn

Are Biodiversity Offsets Relevant for India Views 70 views. More than three years ago, ...
Read more

Biodiversity offsetting: what are the challenges ...

communities are increasingly using biodiversity offsets, ... date have focused on wetlands and grasslands ... Biodiversity offsets and the challenge of ...
Read more

Biodiversity offsetting - Wikipedia, the free encyclopedia

Biodiversity offsetting is a system used predominantly by planning ... biodiversity offsets are designed to result in ... (e.g. new wetland ...
Read more

Principles and Guidelines for Biodiversity Conservation ...

Avoid giving an endorsement to the use of biodiversity offsets before a ... wetland habitat with ... set of challenges and considerations ...
Read more

Critical review of Biodiversity Offset track record

Critical review of Biodiversity Offset ... most biodiversity offsets do not take into consideration the ... offsets from restored or created wetlands is ...
Read more

BIODIVERSITY OFFSETS: LESSONS LEARNT FROM POLICY AND PRACTICE

BIODIVERSITY OFFSETS: ... The wetland offsets guidelines ... for offsets to work for biodiversity One of the main challenges cited by practitioners ...
Read more

Alberta’s New Wetland Policy as a Conservation Offset ...

... Alberta’s New Wetland Policy as a Conservation Offset ... “biodiversity offsets ... Wetland Value. One of the enduring challenges of habitat ...
Read more