A kind of vegetable called "rau muong" vietnamese, (some like the "Liseron d'eau" in French language). "Rau muong" after dried under the sun light becom a reserve nutrient for families in the Vietnam-north before 1945 until after 1958, 1960.
There are many that insects, microorganisms, and eventually plants can use for growth and development.
dead leaves,dried leaves,food crumbs
broccoli,carrots,and dead animal and insect
Crab apple tree leaves.
A dead anything doesn't eat - so it isn't any kind of "~vore". Algae are plants so when they live they absorb nutrients.
Mulch is made of dead plant matter, so it depends on the kind of plants in the mulch. either way, mulch is used to help plants retain water, not usually to give it nutrients.
Any kind of dead leaf rotting in the tank will poison the water and kill the fish. Maple leaves do not belong in a fishes water.
they turn them into nutrients ,also they give off oxygen when they decompose.
Most deciduous trees lose their leaves in Autumn . . . trees like maples, linden trees, elm trees; however, oddly enough, many oak trees do not lose their leaves in Autumn. The leaves turn colors, and then die and turn brown. The dead leaves take their time to drop off. In my area, some oaks still have their dead leaves as late as early Spring.
fruits are not nutrients they have nutrients in them
Koalas are specialist feeders, eating only a few types of gum leaves and blossoms from which they get all nutrients and water requirements. Eucalyptus leaves are tough, toxic and low in nutrition, but the koala's digestive system is capable of removing the toxins, filtering them out by the liver. The caecum completes the process by changing the eucalyptus leaves into digestible nutrients. The process takes time, and the koala has a slow metabolism to enable it to process the leaves, gaining as much nutrition and water from the leaves as it can.
The good kind! Dark green leaves..