Is it necessary to unsubscribe from a Redux store in an Angular component

I am almost certain that i should, but i have not found any specific information on the Redux documentation. My pattern in most of my Angular components, is that i subscribe/unsubscribe to a Redux store like :

import { Component, OnInit } from '@angular/core';

@Component({
    moduleId: module.id,
    selector: 'selector',
    templateUrl: 'name.component.html'
})
export class ComponentNameComponent implements OnInit {
    private unsubscribe : Function;

    constructor(@Inject(AppStore) private store: Store<AppState>) {}

    ngOnInit() {
        this.unsubscribe = this.store.subscribe ( ()=>{ this.updateFromState(); });
    }
    // Is unsubscribing onDestroy necessary?
    ngOnDestroy(){
        this.unsubscribe();
    }

    this.updateFromState(){
        // ...
    }
}

So i would like to know if i should always unsubscribe from the Store, and what would happen if i didn't.