Introduce species that don’t have carryable seeds to new areas

The following three species have the largest biomass values:

• Ledon Zoa - 35 (50 when on Enriched Terrain)
• Halid Zoa - 20 (40 when on Enriched Terrain)
• Prax Zoa - 40 (requires Acidic Terrain)

You should be able get to the highest biomass level on Meadow using only Prax Zoa and Halid Zoa using plenty of Compost.

The level also contains Phyta which only provide 5 biomass each, but will continue to grow in population so long as they are well fed, which should happen automatically if you have enough Halid Zoa producing seeds.

I mentioned this in a previous answer, but I will bring an excerpt of it here:

Phyta and Cycots will stop reproducing once Biomass Level 5 has been reached. When this happens, they will continue to eat seeds, but their eggs will just "dissolve" rather than hatch into a creature.

This is to prevent overpopulation, but if the Biomass Level goes down to 4 or less, the creatures will immediately start populating again until level 5 has been reached. Other than that, those species should continue to populate so long as they are kept "well fed" with seeds.