One compelling argument for reintroduction was the wolf acts as a keystone predator, an animal that affects the populations, behavior and ecology of a wide variety of species within its range.
1	One	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	3:nummod	_
2	compelling	compelling	ADJ	JJ	Degree=Pos	3	amod	3:amod	_
3	argument	argument	NOUN	NN	Number=Sing	0	root	0:root	_
4	for	for	ADP	IN	_	5	case	5:case	_
5	reintroduction	reintroduction	NOUN	NN	Number=Sing	3	nmod	3:nmod:for	_
6	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	3	cop	3:cop	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	8:det	_
8	wolf	wolf	NOUN	NN	Number=Sing	9	nsubj	9:nsubj	_
9	acts	act	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	csubj	3:csubj	_
10	as	as	ADP	IN	_	13	case	13:case	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	13:det	_
12	keystone	keystone	NOUN	NN	Number=Sing	13	compound	13:compound	_
13	predator	predator	NOUN	NN	Number=Sing	9	obl	9:obl:as	SpaceAfter=No
14	,	,	PUNCT	,	_	13	punct	13:punct	_
15	an	a	DET	DT	Definite=Ind|PronType=Art	16	det	16:det	_
16	animal	animal	NOUN	NN	Number=Sing	13	appos	13:appos|18:nsubj	_
17	that	that	PRON	WDT	PronType=Rel	18	nsubj	16:ref	_
18	affects	affect	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	16	acl:relcl	16:acl:relcl	_
19	the	the	DET	DT	Definite=Def|PronType=Art	20	det	20:det	_
20	populations	population	NOUN	NNS	Number=Plur	18	obj	18:obj	SpaceAfter=No
21	,	,	PUNCT	,	_	22	punct	22:punct	_
22	behavior	behavior	NOUN	NN	Number=Sing	20	conj	18:obj|20:conj:and	_
23	and	and	CCONJ	CC	_	24	cc	24:cc	_
24	ecology	ecology	NOUN	NN	Number=Sing	20	conj	18:obj|20:conj:and	_
25	of	of	ADP	IN	_	28	case	28:case	_
26	a	a	DET	DT	Definite=Ind|PronType=Art	28	det	28:det	_
27	wide	wide	ADJ	JJ	Degree=Pos	28	amod	28:amod	_
28	variety	variety	NOUN	NN	Number=Sing	20	nmod	20:nmod:of	_
29	of	of	ADP	IN	_	30	case	30:case	_
30	species	species	NOUN	NNS	Number=Plur	28	nmod	28:nmod:of	_
31	within	within	ADP	IN	_	33	case	33:case	_
32	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	33	nmod:poss	33:nmod:poss	_
33	range	range	NOUN	NN	Number=Sing	30	nmod	30:nmod:within	SpaceAfter=No
34	.	.	PUNCT	.	_	3	punct	3:punct	_
