kenya field work summary: june 2011 arabuko-sokoke, tsavo east and rukinga ranch msu & umd:...

Kenya Field Work Summary: June 2011

Arabuko-Sokoke, Tsavo East and Rukinga Ranch

MSU & UMD: Walter Chomentowski, Chris Justice, Christina Justice, Tatiana Loboda, Dave MacFarlane, Dave Skole, Mike SmalliganKEFRI: Vincent Oeba, Simon Wairungu Wildlife Works: Rob Dodson, Mwololo Muasa, Joel MwandighaICRAF: Shem Kuyah

Arabuko-Sokoke Coastal Forest

MSU Plot ID AGB t C/ha Forest Type 2 Plot Ave215 31.2 Cynometra 33.6216 36.1 Cynometra217 37.3 Brachystegia 43.2218 49.2 Brachystegia219 35.2 Brachystegia/Mixed 29.2220 23.2 Brachystegia/Mixed

Average 35.4

Glenday AGB t C/ha Forest Type35 Cynometra46 Brachystegia38 Mixed

Note: Brown 97 Dry for MSU and Glenday

Six fixed area plots (1,000 m2) in several forest types

Tsavo East National Park Tree Survey(Canon GSP camera photos displayed on Canon Map Utility)

Wildlife Works Rukinga Ranch REDD Project

Notes: 1. MSU did 3 fixed area plots overlapping prior WW plots with a similar but not exact protocol.2. Wildlife Works general allometry for green weight, 50% dry weight, 50% CF, 0.4 R:S3. Table below taken from WW Project Design Document.

WW Plot ID MSU Plot ID AGB t C/ha Total tCO2e/ha Average DBH (cm) Trees >10cm / plot Canopy Cover (leaf OFF)T17 222 18.5 95.0 21.6 31 28%T16 223 4.4 22.5 13.8 22 22%T14 224 1.5 7.9 12.2 11 5%

8.2 41.8 17.3 64 18%

Wildlife Works General Equation comparable to Brown 97 Dry Forests and CBP

CBP predicts somewhat higher biomass above 42cm DBH

Six 500 m transects to identify and measure trees

Canon GPS Camera converted to geodatabase files in ArcMap

Relationship between DBH and crown diameter in Rukinga(Data collected by Wildlife Works)

Similar R2 for trees in western Kenya(Data collected by MSU)

Lower R2 for multi-stem trees(Data collected by Wildlife Works)

Crown to DBH models are specific to their ecosystems

Growth Rates of Trees at Rukinga Ranch

5 cm DBH Class

Tree Count

2 year DBH Growth (cm)

Annual DBH Growth (cm)

2 Year Percent Growth

Annual Percent Growth

5 2 4.1 2.0 75.0% 37.5%10 9 0.5 0.3 4.8% 2.4%15 16 1.3 0.7 9.3% 4.6%20 7 1.8 0.9 8.9% 4.5%25 7 2.6 1.3 10.8% 5.4%30 4 2.8 1.4 9.7% 4.8%35 1 1.9 0.9 5.6% 2.8%

46 1.7 1.1 11.4% 8.9%

• WW inventory in March of 2009• MSU inventory of 3 WW plots (14,16,17) in June of 2011

WHRC Carbon Map: Vast areas of Kenya are greater than Zero t/ha AGB

(Baccini et al. 2008. A first map of tropical Africa’s above-ground biomass derived from satellite imagery.)

Rukinga Ranch Dry Forests ≠ 0 t/ha AGBRukinga Ranch = 15.8 t/ha AGB

(238,668 tonnes C in AGB in 30,168 hectares – 7.9 tC/ha)

Agriculture in Western Kenya ≠ 0 t/haMean of 9 one ha non-forest plots = 33.4 t/ha AGB