Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_15635768_1 ( place_of_issue VARCHAR, ecosystem VARCHAR )

### Question ###
Which location has the ecosystem of kelp forest?

### Accurate SQL ###

SELECT place_of_issue FROM table_15635768_1 WHERE ecosystem = "Kelp Forest"