Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_16577990_1 (tree_species VARCHAR, total_plant_species VARCHAR)
### Question:
How many tree species are there when the total plant species is 113?
### Answer:
SELECT COUNT(tree_species) FROM table_16577990_1 WHERE total_plant_species = 113