TABLE 3.
Naturally occurring PHA in various environments
| Environmental material | Reference | Amt of PHA in environment | Approx PHA repeating-unit ratios (mol%)
|
||
|---|---|---|---|---|---|
| HB | HV | Other HAs | |||
| GSa cyano/green layer, microbial mat | This study | 0.17–0.55 mg/g of dry mat material | 1 | 1 | NDb |
| GSa PSB/pink layer, microbial mat | This study | 0.09–0.83 mg/g of dry mat material | 2 | 3 | ND |
| Garden soil (Hadley, Mass.) | This study | 0.026 mg/g of dry soil | 1 | Trace | ND |
| Garden compost (Hadley, Mass.) | This study | 0.049 mg/g of dry compost | 1 | Trace | ND |
| Sewage sludge (Chicopee, Mass.) | This study | 22.3 mg/g of dry sludge | 2 | 3 | ND |
| Ebro Delta, microbial mat | This study | 5.0 mg/g of dry mat material | 2 | 3 | ND |
| Sewage Sludge | 64 | 1.3% of dry sludge | 1 | 5 | Trace |
| Intertidal sediment, mangrove area | 4 | 0.14 mg/g of dry sediment | 4 | 1 | ND |
| Gypsum-rich sand, red/green area | 4 | 0.095 mg/g of dry sediment | 2 | 3 | ND |
| “Algal” mat, Shark Bay, Australia | 7 | 0.02–0.03% (dry wt) of algal mat | 1 | 1 | |
| 1 | 4 | Trace | |||
| Plankton, Sargasso and Caribbean Seas | 51 | 1.8 mg/g of dry plankton | —c | — | — |
| River biofilm | 21 | 0.05–1 μg/cm2 of biofilm | — | — | — |
| Estuarine sediment | 19 | 31 μmol/g of dry sediment | 1 | 1 | 1 |
| Pond, lake, and lagoon water (Spain) | 48 | 50–500 μg/liter of water | NKd | NK | NK |
| Water, Lake Cisó, Spain | 59 | ≤8 μmol/liter of water | NK | NK | NK |
| Microbial mat, Ebro Delta, Spain | 37 | ≤1.456 mg/g of dry mat material | 2 | 3 | ND |
a
GS, Great Sippewissett Salt Marsh.
b
ND, not determined.
c
—, only PHB analyzed.
d
NK, not definitively known.