Spells per Day

At the indicated levels, a nature warden gains new spells per day as if she had also gained a level in a divine spellcasting class she belonged to before adding the prestige class. She does not, however, gain other benefits a character of that class would have gained, except for additional spells per day, spells known (if she is a spontaneous caster), and an increased effective level of spellcasting. If she had more than one divine spellcasting class before becoming a nature warden, she must decide to which class she adds the new level for the purpose of determining spells per day.