The move follows three decades of indiscriminate Chinese logging and ineffective government efforts at reforestation.
Relatives and friends are warned they will be held responsible if any photos are taken or circulated following his release.
Replacements are hired based on 'backdoor connections' with influential county officials, sources claim.
Chinese law guarantees the freedom of expression, writer Shokjang says in his petition for release from jail.
They had tried to reclaim land seized for a government development project on which no work was ever done.
A local leader and two others are being held for taking part in a group chat about the Sikyong, Tibet's exile political leader.
Tibetans protesting his death in detention are also taken into custody, a local source says.
Police fire on Tibetan herders after they confront Chinese Muslims caught rustling yaks.
Injuries suffered in beatings are now being treated but may not heal, his brother says.
Religious institutions are required to abide by four requirements under the watchful eye of management committees.
Gyaye Phuntsok never recovered from injuries to his legs suffered during beatings in prison, sources say.
Travel by air and by train is banned amid Chinese security fears in a month of sensitive anniversaries.
Hundreds greet him warmly on his return despite authorities' attempts to block a public welcome.
A friend held with him has also completed his sentence but has not yet been released, sources say.
Joleb Jigme had been jailed for revealing state secrets, a charge often made against Tibetans spreading news of political protests.
Exile Tibetan media reports show incumbent Lobsang Sangay ahead in polls.
Selection comes as the struggle for autonomy marks five years since the Dalai Lama withdrew from politics.