The Marine Roseobacter clade is responsible for breaking down a sulphur compound called dimethylsulfoniopropionate (DMSP) that is produced by photosynthesising
Excessive amounts of clippings should be raked up, as large piles of cut grass prevents the turf underneath photosynthesising
and provides ideal conditions for the spread of fungal diseases.
As long as the plant isn't dormant - that is to say it hasn't died back in the case of perennials, and it hasn't lost its leaves in the case of deciduous trees and shrubs - it will be photosynthesising
and therefore losing water.
Excessive amounts of clippings should always be raked up, as large clumps left on the lawn surface will prevent the turf underneath from photosynthesising
, creating suitable conditions for the spread of fungal diseases.