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Biophysical and Socioeconomic Assessments: The LOICZ* Approach. Liana Talaue-McManus Rosenstiel School of Marine and Atmospheric Science University of Miami LOICZ Nutrient Budget & Typology Teams *Land-Ocean Interaction in the Coastal Zone. Objectives.

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biophysical and socioeconomic assessments the loicz approach

Biophysical and Socioeconomic Assessments: The LOICZ* Approach

Liana Talaue-McManus

Rosenstiel School of Marine and Atmospheric Science University of Miami

LOICZ Nutrient Budget & Typology Teams

*Land-Ocean Interaction in the Coastal Zone

objectives
Objectives
  • LOICZ framework in assessing the role of the global coast in material (carbon, nutrients, freshwater) delivery and cycling.
  • A resource in identifying/ formulating indicators for themes on coastal water quality and eutrophication
  • Scale:
    • Local: catchments and associated estuarine areas
    • Regional and global carbon assessments
outline
Outline
  • Goals of LOICZ as a Core Project of the International Geosphere-Biosphere Programme (IGBP)
  • Biophysical approaches
  • Socio-economic approaches
  • Future directions
slide4

anthropogenic influence

  • trace gas emissions
  • source/ sink for Carbon dioxide
  • land use, climate, sea level on material fluxes and coastal morphodynamics
  • interphase with integrated coastal management
  • mass balances of C, N and P
slide5

Global

Typology

SCALES

Vertical fluxes

Regional

Horizontal fluxes

Basins

Coastal Seas

Oceans

MATERIAL FLUX MODELS

Local

Ecosystems & Habitats & People

LOICZ

slide6

22002222

Using global

Databases to

Scale up

200 sites

with nutrient

budgets

Clustering

& Visualization

tools

Typology

To discern

Regional &

Global patterns

PrPredictive

relationships

Nutrient

Budget

Modeling

slide7

DATA NEEDS:

  • System area and volume
  • River runoff, precipitation, & evaporation
  • Salinity gradient
  • Nutrient loads
  • DIP concentrations
  • DIN concentrations
  • DOP, DON (if available)
  • DIC (if available).
stoichiometry
Stoichiometry

106CO2 + 16H+ + 16NO3- + H3PO4 + 122H2O

(CH2O)106(NH3)16H3PO4 + 138O2

Redfield Equation

(p-r) or net ecosystem metabolism, NEM

= - DIP x 106 (C:P)

(nfix-denit) = DINobs - DINexp

= DINobs - DIP x 16 (N:P)

Where: (C:P) ratio is 106:1 and

(N:P) ratio is 16:1 (Redfield ratio)

Note: Redfield C:N:P is a good approximation where

local C:N:P is absent (e.g. mangrove litter).

socioeconomic assessments
Socioeconomic Assessments
  • Site specific:
    • Population
    • Waste load from economic
  • Global:
    • Population
    • Waste load proxies
      • Agricultural land cover
      • Runoff (natural + anthropogenic sources)
methods

RESIDUALS

ESTUARINE

SUB-SYTEM

ECONOMIC

SUB-SYSTEM

RESOURCES

Methods

Input-Output Modelling

(James 1985)

Biogeochemical

Budget Modelling

(Gordon et al. 1996)

input output model 11 economic sectors
Agriculture

Fishery

Forestry

Mining & quarrying

Heavy manufacturing (I)

Light manufacturing (II)

Electricity, gas & water

Waterworks & supply

Construction

Transport, communication & storage

Other services

Household

Input-Output Model:11 Economic Sectors
predictive relationships
Predictive relationships

Log (mol DIP km-2 yr-1) =

2.72 + 0.36 X log (persons km-2 ) +

0.78 X log (runoff in m3 yr-1)

DIP load, number of persons, and runoff scaled to catchment basin area

N=168; r2 = 0.58 (Smith et al, in prep.)

loicz typology database
LOICZ Typology Database
  • 0.5 degree grid
  • 47,057 cells (out of 259,200 total for earth’s surface) make up primary typology cells
    • Coastal (with shoreline; NOAA 1999)
    • Stream network (U. New Hampshire 1999)
    • Grid cell composition:

Coastal (15,278 cells)

+ terrestrial (immed. Landward) (12,449 cells)

+ oceanic (immed. Seaward) (19,330 cells)

slide20

Yield

Load

potential directions
Potential Directions
  • Systematic assessments of socioeconomic drivers along rural-urban gradients
    • System state feedbacks on resource-based economic activities (capture fisheries, aquaculture, tourism)
    • Watershed management
      • Fertilizer policy and use
      • Sewage and wastewater treatment
      • Land use and cover change